<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPolicies" xlink:href="trow-20191231.xsd#BasisOfPreparationAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesNewAccountingGuidanceDetails" xlink:href="trow-20191231.xsd#BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesNewAccountingGuidanceDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="trow-20191231.xsd#BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:href="trow-20191231.xsd#BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:href="trow-20191231.xsd#BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/CashEquivalents" xlink:href="trow-20191231.xsd#CashEquivalents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/CashEquivalentsDetails" xlink:href="trow-20191231.xsd#CashEquivalentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/CommitmentsAndContingencies" xlink:href="trow-20191231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedBalanceSheets" xlink:href="trow-20191231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="trow-20191231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfIncome" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:href="trow-20191231.xsd#ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProducts" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProducts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsFairValueMeasurementsDetails" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProductsFairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsNetAssetsDetails" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProductsNetAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsOperatingResultsDetails" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProductsOperatingResultsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsStatementOfCashFlowsDetails" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProductsStatementOfCashFlowsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsTables" xlink:href="trow-20191231.xsd#ConsolidatedTRowePriceInvestmentProductsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/Cover" xlink:href="trow-20191231.xsd#Cover" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/DellAppraisalRightsMatter" xlink:href="trow-20191231.xsd#DellAppraisalRightsMatter" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/DellAppraisalRightsMatterDetails" xlink:href="trow-20191231.xsd#DellAppraisalRightsMatterDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/EarningsPerShareCalculations" xlink:href="trow-20191231.xsd#EarningsPerShareCalculations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/EarningsPerShareCalculationsDetails" xlink:href="trow-20191231.xsd#EarningsPerShareCalculationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/EarningsPerShareCalculationsTables" xlink:href="trow-20191231.xsd#EarningsPerShareCalculationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/FairValueMeasurements" xlink:href="trow-20191231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/FairValueMeasurementsDetails" xlink:href="trow-20191231.xsd#FairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/FairValueMeasurementsTables" xlink:href="trow-20191231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxes" xlink:href="trow-20191231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesChangesInUnrecognizedTaxBenefitsDetails" xlink:href="trow-20191231.xsd#IncomeTaxesChangesInUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesDeferredIncomeTaxesTaxBenefitsDetails" xlink:href="trow-20191231.xsd#IncomeTaxesDeferredIncomeTaxesTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:href="trow-20191231.xsd#IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesNarrativeDetails" xlink:href="trow-20191231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesNetDeferredTaxAssetsDetails" xlink:href="trow-20191231.xsd#IncomeTaxesNetDeferredTaxAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:href="trow-20191231.xsd#IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/IncomeTaxesTables" xlink:href="trow-20191231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServices" xlink:href="trow-20191231.xsd#InformationAboutReceivablesRevenuesAndServices" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesInvestmentAdvisoryServicesDetails" xlink:href="trow-20191231.xsd#InformationAboutReceivablesRevenuesAndServicesInvestmentAdvisoryServicesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesServicesConcentrationAndReceivablesDetails" xlink:href="trow-20191231.xsd#InformationAboutReceivablesRevenuesAndServicesServicesConcentrationAndReceivablesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesTables" xlink:href="trow-20191231.xsd#InformationAboutReceivablesRevenuesAndServicesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/Investments" xlink:href="trow-20191231.xsd#Investments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InvestmentsInvestmentsDetails" xlink:href="trow-20191231.xsd#InvestmentsInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InvestmentsTables" xlink:href="trow-20191231.xsd#InvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/InvestmentsVariableInterestEntitiesDetails" xlink:href="trow-20191231.xsd#InvestmentsVariableInterestEntitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/Leases" xlink:href="trow-20191231.xsd#Leases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/LeasesAdditionalInformationDetails" xlink:href="trow-20191231.xsd#LeasesAdditionalInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/LeasesScheduleOfFutureMinimumLeasePaymentsDetails" xlink:href="trow-20191231.xsd#LeasesScheduleOfFutureMinimumLeasePaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/LeasesTables" xlink:href="trow-20191231.xsd#LeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncome" xlink:href="trow-20191231.xsd#OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:href="trow-20191231.xsd#OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeDeferredTaxBenefitsIncomeTaxesDetails" xlink:href="trow-20191231.xsd#OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeDeferredTaxBenefitsIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeTables" xlink:href="trow-20191231.xsd#OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherDisclosures" xlink:href="trow-20191231.xsd#OtherDisclosures" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/OtherDisclosuresDetails" xlink:href="trow-20191231.xsd#OtherDisclosuresDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/PropertyAndEquipment" xlink:href="trow-20191231.xsd#PropertyAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/PropertyAndEquipmentDetails" xlink:href="trow-20191231.xsd#PropertyAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/PropertyAndEquipmentTables" xlink:href="trow-20191231.xsd#PropertyAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensation" xlink:href="trow-20191231.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensationDetails" xlink:href="trow-20191231.xsd#StockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensationFutureStockBasedCompensationExpenseDetails" xlink:href="trow-20191231.xsd#StockBasedCompensationFutureStockBasedCompensationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensationRestrictedSharesAndStockUnitsDetails" xlink:href="trow-20191231.xsd#StockBasedCompensationRestrictedSharesAndStockUnitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensationStockOptionsDetails" xlink:href="trow-20191231.xsd#StockBasedCompensationStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockBasedCompensationTables" xlink:href="trow-20191231.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockholdersEquity" xlink:href="trow-20191231.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/StockholdersEquityDetails" xlink:href="trow-20191231.xsd#StockholdersEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnaudited" xlink:href="trow-20191231.xsd#SupplementaryQuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnauditedDetails" xlink:href="trow-20191231.xsd#SupplementaryQuarterlyFinancialDataUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnauditedTables" xlink:href="trow-20191231.xsd#SupplementaryQuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesNewAccountingGuidanceDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_DA7ADD64747CA807AC471AD673A9ED63" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_DA7ADD64747CA807AC471AD673A9ED63" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_76B6A195A1DDE59E80361AD673A9DC77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_DA7ADD64747CA807AC471AD673A9ED63" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_76B6A195A1DDE59E80361AD673A9DC77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_0BE396B43692DAD33CB61AD673AA6AA9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_76B6A195A1DDE59E80361AD673A9DC77" xlink:to="loc_us-gaap_TypeOfAdoptionMember_0BE396B43692DAD33CB61AD673AA6AA9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_0BE396B43692DAD33CB61AD673AA6AA9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_76B6A195A1DDE59E80361AD673A9DC77" xlink:to="loc_us-gaap_TypeOfAdoptionMember_0BE396B43692DAD33CB61AD673AA6AA9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_7CF969898DC13C59E4811AD673AAFF0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_0BE396B43692DAD33CB61AD673AA6AA9" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_7CF969898DC13C59E4811AD673AAFF0E" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OperatingLeaseRightOfUseAssetExcludingDeferredRentLiabilitiesToBeReclassified" xlink:label="loc_trow_OperatingLeaseRightOfUseAssetExcludingDeferredRentLiabilitiesToBeReclassified_CBB5B6B61E54F32066C01AD673AA208C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:to="loc_trow_OperatingLeaseRightOfUseAssetExcludingDeferredRentLiabilitiesToBeReclassified_CBB5B6B61E54F32066C01AD673AA208C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_E4EFB31B73AC31F943751AD673AB0250" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:to="loc_us-gaap_OperatingLeaseLiability_E4EFB31B73AC31F943751AD673AB0250" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRentCredit" xlink:label="loc_us-gaap_DeferredRentCredit_CAA6D23AE599755142B61AD673AB5B57" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:to="loc_us-gaap_DeferredRentCredit_CAA6D23AE599755142B61AD673AB5B57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_022B26C1F9EF50AF771A1AD673ABB307" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_E23A2F3E66EB826E078E1AD673AAB2D5" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_022B26C1F9EF50AF771A1AD673ABB307" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8A7EBB1CAEC3CEB7078DF10436D054D0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_CFC955508E103C929D1CF10436CF545C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8A7EBB1CAEC3CEB7078DF10436D054D0" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_CFC955508E103C929D1CF10436CF545C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D0C9173F25DAE20D1619F10436CF02F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_CFC955508E103C929D1CF10436CF545C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D0C9173F25DAE20D1619F10436CF02F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D0C9173F25DAE20D1619F10436CF02F6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D0C9173F25DAE20D1619F10436CF02F6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ComputerAndCommunicationsSoftwareAndEquipmentMember" xlink:label="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_338EA741EC44FBB3E2A2F10436CFE462" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:to="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_338EA741EC44FBB3E2A2F10436CFE462" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_7B1C480C7B9B45AA05D9F10436D04C0A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_7B1C480C7B9B45AA05D9F10436D04C0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_87E625A89FDB1577D2ABF10436D01DA2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_87E625A89FDB1577D2ABF10436D01DA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_A6307D5724EA44164B0EF10436D0C00E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_A6307D5724EA44164B0EF10436D0C00E" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_LeasedLandMember" xlink:label="loc_trow_LeasedLandMember_6AD5D94B1D64D5ABB833F10436D00E4C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_4C4F86DB671504CDEDC1F10436CF5ADD" xlink:to="loc_trow_LeasedLandMember_6AD5D94B1D64D5ABB833F10436D00E4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_DA7E1B93B3CC34A1B223F10436D0E2D8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8A7EBB1CAEC3CEB7078DF10436D054D0" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_DA7E1B93B3CC34A1B223F10436D0E2D8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_70F3F7D4E54D8A6AA0C9F10436C8302F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_70F3F7D4E54D8A6AA0C9F10436C8302F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_3F8068C23EC541E21411F10436C80107" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_70F3F7D4E54D8A6AA0C9F10436C8302F" xlink:to="loc_us-gaap_PlanNameAxis_3F8068C23EC541E21411F10436C80107" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_3F8068C23EC541E21411F10436C80107" xlink:to="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_3F8068C23EC541E21411F10436C80107" xlink:to="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_EmployeeStockBasedCompensationProgramsMember" xlink:label="loc_trow_EmployeeStockBasedCompensationProgramsMember_EF3CF69AF9A32E92EF44F10436C9D61A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA" xlink:to="loc_trow_EmployeeStockBasedCompensationProgramsMember_EF3CF69AF9A32E92EF44F10436C9D61A" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DirectorPlansMember" xlink:label="loc_trow_DirectorPlansMember_F3448E660CEB7D18917FF10436C9CA4A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA" xlink:to="loc_trow_DirectorPlansMember_F3448E660CEB7D18917FF10436C9CA4A" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_A2017NonEmployeeDirectorEquityPlanMember" xlink:label="loc_trow_A2017NonEmployeeDirectorEquityPlanMember_94ABE8FDF43576D7CBAAF10436C97252" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DirectorPlansMember_F3448E660CEB7D18917FF10436C9CA4A" xlink:to="loc_trow_A2017NonEmployeeDirectorEquityPlanMember_94ABE8FDF43576D7CBAAF10436C97252" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_A2012LongTermIncentivePlanAndthe2017NonEmployeeDirectorEquityPlanMember" xlink:label="loc_trow_A2012LongTermIncentivePlanAndthe2017NonEmployeeDirectorEquityPlanMember_E92C2132C99BEA2C3363F10436CA0790" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_3448BE4FF73B1A65F7A3F10436C971AA" xlink:to="loc_trow_A2012LongTermIncentivePlanAndthe2017NonEmployeeDirectorEquityPlanMember_E92C2132C99BEA2C3363F10436CA0790" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_EEFBDB8DACB25F80B979F10436CADCEC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_70F3F7D4E54D8A6AA0C9F10436C8302F" xlink:to="loc_us-gaap_AwardTypeAxis_EEFBDB8DACB25F80B979F10436CADCEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_EEFBDB8DACB25F80B979F10436CADCEC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_EEFBDB8DACB25F80B979F10436CADCEC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_RestrictedStockAndRestrictedStockUnitsMember" xlink:label="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_F7F6AADC3567EEA3E5F2F10436CAE8C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9" xlink:to="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_F7F6AADC3567EEA3E5F2F10436CAE8C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_63498B50B07A8F21A62FF10436CA0C7C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BA47823FF5C58E0BB87DF10436CA74F9" xlink:to="loc_us-gaap_EmployeeStockOptionMember_63498B50B07A8F21A62FF10436CA0C7C" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockholderApprovedPlansForStockOptions" xlink:label="loc_trow_StockholderApprovedPlansForStockOptions_99A86449CEA4CB966C51F10436CB8389" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:to="loc_trow_StockholderApprovedPlansForStockOptions_99A86449CEA4CB966C51F10436CB8389" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_EC55D19C0A152BD6F33FF10436CBE211" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_EC55D19C0A152BD6F33FF10436CBE211" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_67A8B52CA24CC5BCDE9FF10436CB0507" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_67A8B52CA24CC5BCDE9FF10436CB0507" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_521EF393C0EB705EA33EF10436CB03FD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_02538502531C564C2B75F10436CAE812" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_521EF393C0EB705EA33EF10436CB03FD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CashEquivalents" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CashEquivalentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_27C538B3374D4E0EEBFAF10436C23D21" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_B047AB326F0AF47052F1F10436C1B479" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_27C538B3374D4E0EEBFAF10436C23D21" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_B047AB326F0AF47052F1F10436C1B479" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_6E9E66355C80E12AF96EF10436C28687" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_B047AB326F0AF47052F1F10436C1B479" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_6E9E66355C80E12AF96EF10436C28687" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_AAD90E20B4C61B04C696F10436C2D898_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_6E9E66355C80E12AF96EF10436C28687" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_AAD90E20B4C61B04C696F10436C2D898_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_AAD90E20B4C61B04C696F10436C2D898" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_6E9E66355C80E12AF96EF10436C28687" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_AAD90E20B4C61B04C696F10436C2D898" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_60FB081B731CD931D5A5F10436C251BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_AAD90E20B4C61B04C696F10436C2D898" xlink:to="loc_us-gaap_MoneyMarketFundsMember_60FB081B731CD931D5A5F10436C251BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeDividend" xlink:label="loc_us-gaap_InvestmentIncomeDividend_DDEA98192AB2ED5FF266F10436C2DF26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_27C538B3374D4E0EEBFAF10436C23D21" xlink:to="loc_us-gaap_InvestmentIncomeDividend_DDEA98192AB2ED5FF266F10436C2DF26" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedBalanceSheets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_9E6C298EB087242E0606F104374A7032" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_DE72C2E28C897C0C0CECF1043744DA55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_9E6C298EB087242E0606F104374A7032" xlink:to="loc_us-gaap_StatementTable_DE72C2E28C897C0C0CECF1043744DA55" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_8780EA7CECFD798735FCF10437446DF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_DE72C2E28C897C0C0CECF1043744DA55" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_8780EA7CECFD798735FCF10437446DF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_9821D921048B8B3F33BBF1043745559A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_8780EA7CECFD798735FCF10437446DF2" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_9821D921048B8B3F33BBF1043745559A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_9821D921048B8B3F33BBF1043745559A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_8780EA7CECFD798735FCF10437446DF2" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_9821D921048B8B3F33BBF1043745559A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_58E2D9CA1A233F4BD9B7F1043745E4E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_9821D921048B8B3F33BBF1043745559A" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_58E2D9CA1A233F4BD9B7F1043745E4E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_CB19133238D37DBD2E6EF104374A1366" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9E6C298EB087242E0606F104374A7032" xlink:to="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_CB19133238D37DBD2E6EF104374A1366" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_16DF5A14CBC004EEB434F104374B6D4D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9E6C298EB087242E0606F104374A7032" xlink:to="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_16DF5A14CBC004EEB434F104374B6D4D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_252C0360F08C5E5892E3F10436F95062" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_9C5EBA432F25D0E25856F10436F82F58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_252C0360F08C5E5892E3F10436F95062" xlink:to="loc_us-gaap_StatementTable_9C5EBA432F25D0E25856F10436F82F58" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_A2801DA3712D6BBBB3A6F10436F82845" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_9C5EBA432F25D0E25856F10436F82F58" xlink:to="loc_srt_ConsolidatedEntitiesAxis_A2801DA3712D6BBBB3A6F10436F82845" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_C47A82FDC82BA87C417EF10436F961E3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_A2801DA3712D6BBBB3A6F10436F82845" xlink:to="loc_srt_ConsolidatedEntitiesDomain_C47A82FDC82BA87C417EF10436F961E3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_C47A82FDC82BA87C417EF10436F961E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_A2801DA3712D6BBBB3A6F10436F82845" xlink:to="loc_srt_ConsolidatedEntitiesDomain_C47A82FDC82BA87C417EF10436F961E3" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ConsolidatedInvestmentPortfoliosMember" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_F871B8C3239DADD6DD29F10436F987EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_C47A82FDC82BA87C417EF10436F961E3" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_F871B8C3239DADD6DD29F10436F987EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_C98FEDB901B6DB8FFBDEF10A42254FEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_252C0360F08C5E5892E3F10436F95062" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_C98FEDB901B6DB8FFBDEF10A42254FEF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_E8E8E9FBE809E161A2DF1AD674628F58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_StatementTable_E8E8E9FBE809E161A2DF1AD674628F58" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_B09C6F575BFAFB15059B1AD67462DADF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_E8E8E9FBE809E161A2DF1AD674628F58" xlink:to="loc_srt_ConsolidatedEntitiesAxis_B09C6F575BFAFB15059B1AD67462DADF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_B09C6F575BFAFB15059B1AD67462DADF" xlink:to="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_B09C6F575BFAFB15059B1AD67462DADF" xlink:to="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_54547CDC55B43ABEA67C1AD674684089" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_54547CDC55B43ABEA67C1AD674684089" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvesteeMember" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_2DCB2AED0720590004A71AD67468B724" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_D0E8718594617CF0C7591AD67468E1E0" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_2DCB2AED0720590004A71AD67468B724" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_15C5AAD0FBEE9359D8C91AD67469207C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_ProfitLoss_15C5AAD0FBEE9359D8C91AD67469207C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_B5E6BE0D114E137EDA791AD67469A39F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_B5E6BE0D114E137EDA791AD67469A39F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_95356145C291EE44F5011AD67469EEF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_B5E6BE0D114E137EDA791AD67469A39F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_95356145C291EE44F5011AD67469EEF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_A2223A040781AA84F58E1AD6746A1FA0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_B5E6BE0D114E137EDA791AD67469A39F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_A2223A040781AA84F58E1AD6746A1FA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_F3A40A31B527CA06C8EF1AD6746AC7A0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_B5E6BE0D114E137EDA791AD67469A39F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_F3A40A31B527CA06C8EF1AD6746AC7A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_3DDF423BAD24EFFF7A9D1AEEFCF27076" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_3DDF423BAD24EFFF7A9D1AEEFCF27076" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract" xlink:label="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:to="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherComprehensiveIncomeLossAdjustmentForCapitalGainDistributionReceivedBeforeTax1" xlink:label="loc_trow_OtherComprehensiveIncomeLossAdjustmentForCapitalGainDistributionReceivedBeforeTax1_BBB6C81E04AF8B9C005A1AD6746A2567" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:to="loc_trow_OtherComprehensiveIncomeLossAdjustmentForCapitalGainDistributionReceivedBeforeTax1_BBB6C81E04AF8B9C005A1AD6746A2567" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_E52D3FEE1960892EA6581AD6746B1A67" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_E52D3FEE1960892EA6581AD6746B1A67" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForInvestmentTransferredFromAvailableForSaleToTradingSecuritiesBeforeTax" xlink:label="loc_trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForInvestmentTransferredFromAvailableForSaleToTradingSecuritiesBeforeTax_5DE5F400AF1B96F2BA551AD6746BFB7B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:to="loc_trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForInvestmentTransferredFromAvailableForSaleToTradingSecuritiesBeforeTax_5DE5F400AF1B96F2BA551AD6746BFB7B" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAvailableForSaleSecuritiesBeforeTax" xlink:label="loc_trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAvailableForSaleSecuritiesBeforeTax_042C1F60C560965CFCB01AD6746BA103" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_OtherComprehensiveIncomeLossAvailableForSaleReclassificationAdjustmentFromAOCIBeforeTaxAbstract_AA8CB4C453CB54B146C91AD6746A3281" xlink:to="loc_trow_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAvailableForSaleSecuritiesBeforeTax_042C1F60C560965CFCB01AD6746BA103" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_2450619D77698B6D74AD1AD6746B9E09" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_2450619D77698B6D74AD1AD6746B9E09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_65915F6531042E9386131AD6746BD8A4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_435E3D5A086D6B3D98DE1AD67469E4B3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_65915F6531042E9386131AD6746BD8A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_A7AB6C4B289487916BF11AD6746C47DC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_A7AB6C4B289487916BF11AD6746C47DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_10DF3D5D085FE378D8981AD6746CD7C0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_10DF3D5D085FE378D8981AD6746CD7C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_E0B2049A1B1E20E0379A1AD6746CA25A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_E0B2049A1B1E20E0379A1AD6746CA25A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_4CDEF6B73F0A624A225B1AD6746C582C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_4CDEF6B73F0A624A225B1AD6746C582C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_91CBDFA1CD0EE44FCE731AD6746C9EF4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_520F6385E5A665696D101AD67469F2A7" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_91CBDFA1CD0EE44FCE731AD6746C9EF4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_C33D839FC861D8AD97881AD6748DED10" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_StatementTable_C33D839FC861D8AD97881AD6748DED10" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_30A45179108CC9D964161AD6748E458B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_C33D839FC861D8AD97881AD6748DED10" xlink:to="loc_srt_ProductOrServiceAxis_30A45179108CC9D964161AD6748E458B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_30A45179108CC9D964161AD6748E458B" xlink:to="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_30A45179108CC9D964161AD6748E458B" xlink:to="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetManagement1Member" xlink:label="loc_us-gaap_AssetManagement1Member_7B193D22A67A3A82A4EF1AD6748E1929" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179" xlink:to="loc_us-gaap_AssetManagement1Member_7B193D22A67A3A82A4EF1AD6748E1929" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AdministrativeDistributionAndServicingMember" xlink:label="loc_trow_AdministrativeDistributionAndServicingMember_780043C708A0BA8E6D401AD6748FF7C5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91B7D577B498905A450E1AD6748E4179" xlink:to="loc_trow_AdministrativeDistributionAndServicingMember_780043C708A0BA8E6D401AD6748FF7C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_58960112A1898819FC111AF416870DB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_RevenuesAbstract_58960112A1898819FC111AF416870DB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5E9467404319459D58C01AF416906A5A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_58960112A1898819FC111AF416870DB1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5E9467404319459D58C01AF416906A5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_4B60CC01848FF302C03D1AD674955C6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_us-gaap_LaborAndRelatedExpense_4B60CC01848FF302C03D1AD674955C6E" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DistributionExpenses" xlink:label="loc_trow_DistributionExpenses_536460F1A60B2AB2366A1AD67495F440" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_trow_DistributionExpenses_536460F1A60B2AB2366A1AD67495F440" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_D5D54F0AEC4FD14361041AD67495350A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_D5D54F0AEC4FD14361041AD67495350A" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ProductRelatedAndClientServicingExpenses" xlink:label="loc_trow_ProductRelatedAndClientServicingExpenses_90B6C071A95A8FDD72381AD674958C57" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_trow_ProductRelatedAndClientServicingExpenses_90B6C071A95A8FDD72381AD674958C57" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_TechnologyDepreciationOccupancyAndFacilityExpenses" xlink:label="loc_trow_TechnologyDepreciationOccupancyAndFacilityExpenses_4B123CD6EDE2D153B8D51AD674966FAB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_trow_TechnologyDepreciationOccupancyAndFacilityExpenses_4B123CD6EDE2D153B8D51AD674966FAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense_81ABBDE336FE24CB14841AD674968A7B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_us-gaap_OtherGeneralAndAdministrativeExpense_81ABBDE336FE24CB14841AD674968A7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds" xlink:label="loc_us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds_27B9A9110F9B05CE02401AD67496D4E4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds_27B9A9110F9B05CE02401AD67496D4E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_722F07704D47BA304CD41AD674961C71" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_5CD6F138FC7DA26084EA1AD674955288" xlink:to="loc_us-gaap_OperatingExpenses_722F07704D47BA304CD41AD674961C71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_0F89996D3D2A012C91D11AD6749634E6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_OperatingIncomeLoss_0F89996D3D2A012C91D11AD6749634E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios" xlink:label="loc_trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios_98C4A8977FAC97E043B31AD6749778E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:to="loc_trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios_98C4A8977FAC97E043B31AD6749778E4" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios" xlink:label="loc_trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios_824B9CA83CE46BCDC8FD1AD674977FE4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:to="loc_trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios_824B9CA83CE46BCDC8FD1AD674977FE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_863D52AEE59219500FD21AD67497100D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_863D52AEE59219500FD21AD67497100D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_E0C471F19B8799EF0DA51AD67497068C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_C3F450E016EE001D8FDF1AD6749789D7" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_E0C471F19B8799EF0DA51AD67497068C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93A6ACF7A18DBB3C365E1AD67498E206" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93A6ACF7A18DBB3C365E1AD67498E206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_69FE13BDFF3273FF475B1AD67498394F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_69FE13BDFF3273FF475B1AD67498394F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_2AD55FE389C3854431FA1AD67498ED24" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_ProfitLoss_2AD55FE389C3854431FA1AD67498ED24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_3B3C6C3CF6BB55B2B7851AD67498E311" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_3B3C6C3CF6BB55B2B7851AD67498E311" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_50D1A5A4BEFEF20CF7CA1AD67498DB73" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_NetIncomeLoss_50D1A5A4BEFEF20CF7CA1AD67498DB73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_63EACB265B5E58FDDFF61AD6749909D6" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D8A1C6D48A1D4E29DB1AD6748FEB11" xlink:to="loc_us-gaap_EarningsPerShareAbstract_63EACB265B5E58FDDFF61AD6749909D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_48AEE6CF2213854934C01AD67499ED31" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_63EACB265B5E58FDDFF61AD6749909D6" xlink:to="loc_us-gaap_EarningsPerShareBasic_48AEE6CF2213854934C01AD67499ED31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_E96331AF087A61E506C21AD67499F857" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_63EACB265B5E58FDDFF61AD6749909D6" xlink:to="loc_us-gaap_EarningsPerShareDiluted_E96331AF087A61E506C21AD67499F857" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_096624CB7BFD03085E08F10436ED5484" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_60E16CAC826C807E18BBF10436EA0854" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_096624CB7BFD03085E08F10436ED5484" xlink:to="loc_us-gaap_StatementTable_60E16CAC826C807E18BBF10436EA0854" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_483FAF47186F3A1AEDE5F10436EAC56D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_60E16CAC826C807E18BBF10436EA0854" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_483FAF47186F3A1AEDE5F10436EAC56D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_483FAF47186F3A1AEDE5F10436EAC56D" xlink:to="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_483FAF47186F3A1AEDE5F10436EAC56D" xlink:to="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_4E9CA78568683DABA2DDF10436EA4CF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:to="loc_us-gaap_CommonStockMember_4E9CA78568683DABA2DDF10436EA4CF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_7C0FC1E6CD2EB063A716F10436EB5EB6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_7C0FC1E6CD2EB063A716F10436EB5EB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember" xlink:label="loc_us-gaap_RetainedEarningsUnappropriatedMember_6A71351791FA335D9AF8F10436EB24B9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:to="loc_us-gaap_RetainedEarningsUnappropriatedMember_6A71351791FA335D9AF8F10436EB24B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_C01F3BFEE922323E6B23F10436EBE049" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3F7096FFAD44872658EBF10436EADD3F" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_C01F3BFEE922323E6B23F10436EBE049" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78851D880FD4AB299131F10436EB45ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_60E16CAC826C807E18BBF10436EA0854" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78851D880FD4AB299131F10436EB45ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78851D880FD4AB299131F10436EB45ED" xlink:to="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_78851D880FD4AB299131F10436EB45ED" xlink:to="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_8343F0651C6B33379986F10436EC66DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_8343F0651C6B33379986F10436EC66DE" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember" xlink:label="loc_trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember_981618D1A32DA68C13C7F10436ECA898" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_0E1762DE21B767308F87F10436EB8703" xlink:to="loc_trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember_981618D1A32DA68C13C7F10436ECA898" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_9FB8B52AE79623FC9EDAF10436EC1806" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_60E16CAC826C807E18BBF10436EA0854" xlink:to="loc_us-gaap_AwardTypeAxis_9FB8B52AE79623FC9EDAF10436EC1806" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_9FB8B52AE79623FC9EDAF10436EC1806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_9FB8B52AE79623FC9EDAF10436EC1806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_5510BD8E4E05C94CDF49F10436EC6D79" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2" xlink:to="loc_us-gaap_RestrictedStockMember_5510BD8E4E05C94CDF49F10436EC6D79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_7718F50B756DF8CA020BF10436EDAC84" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0E7D6CCFD42E7B93169AF10436EC9DD2" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_7718F50B756DF8CA020BF10436EDAC84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_096624CB7BFD03085E08F10436ED5484" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_FFD569AD0BE0BAF76A4FF10436ED9643" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_SharesOutstanding_FFD569AD0BE0BAF76A4FF10436ED9643" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_AABE912A6C67C55D9612F10436EE1C27" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_StockholdersEquity_AABE912A6C67C55D9612F10436EE1C27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_C9401FF3E99BC4905B07F10436EE5279" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_C9401FF3E99BC4905B07F10436EE5279" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockholdersEquityAttributabletoParentAdjustedBalance" xlink:label="loc_trow_StockholdersEquityAttributabletoParentAdjustedBalance_F18A53EE38B5E3F72A6DF10436EE2D0D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_trow_StockholdersEquityAttributabletoParentAdjustedBalance_F18A53EE38B5E3F72A6DF10436EE2D0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_FF1B0E266BE0165AFF1AF10436EE31C5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_NetIncomeLoss_FF1B0E266BE0165AFF1AF10436EE31C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_992E688BDEF019251770F10436EE7CE7" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_992E688BDEF019251770F10436EE7CE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCash" xlink:label="loc_us-gaap_DividendsCash_C02AA3F4AB7668164995F10436EEEC43" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_DividendsCash_C02AA3F4AB7668164995F10436EEEC43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_A3E64A97F15EC39A96BFF10436EFCAF7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_A3E64A97F15EC39A96BFF10436EFCAF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_AA930E7D1DD3654BC778F10436EF194F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_AA930E7D1DD3654BC778F10436EF194F" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfSharesWithheldForTaxes" xlink:label="loc_trow_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfSharesWithheldForTaxes_D9676A0BA6CAB509DB83F10436EF6537" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_trow_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfSharesWithheldForTaxes_D9676A0BA6CAB509DB83F10436EF6537" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfSharesWithheldForTaxes" xlink:label="loc_trow_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfSharesWithheldForTaxes_31A997F6BB1CA919DF92F10436EF32EF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_trow_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfSharesWithheldForTaxes_31A997F6BB1CA919DF92F10436EF32EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_A6BB0D54F9D36F6E0571F10436F0A388" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_A6BB0D54F9D36F6E0571F10436F0A388" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_80E16511635AF0129A9EF10436F0B046" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_80E16511635AF0129A9EF10436F0B046" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4A3C440D2AD3214D0DEEF10436F0E470" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4A3C440D2AD3214D0DEEF10436F0E470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsSharebasedCompensationPaidInKind" xlink:label="loc_us-gaap_DividendsSharebasedCompensationPaidInKind_BDD4ED7037EBDACFFF86F10436F0C8BC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_8EC46134FBEF1B68552CF10436EF4656" xlink:to="loc_us-gaap_DividendsSharebasedCompensationPaidInKind_BDD4ED7037EBDACFFF86F10436F0C8BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_9E25B1F7ACA7D74C3143F10436F022FC" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_9E25B1F7ACA7D74C3143F10436F022FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_287C4E1220439BE9CDC2F10436F07357" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_FF1948876487F5A8E906F10436ED795D" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_287C4E1220439BE9CDC2F10436F07357" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_096624CB7BFD03085E08F10436ED5484" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_5F1E875F34B3325BD5DEF10436F1C987" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_5F1E875F34B3325BD5DEF10436F1C987" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_9458DF19196124FF42A4F10436F1322D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_9458DF19196124FF42A4F10436F1322D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_24AAE57F65935499D975F10436F1DC7E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_24AAE57F65935499D975F10436F1DC7E" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest" xlink:label="loc_trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest_68D7A98D443FDC3DB064F10436F27926" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:to="loc_trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest_68D7A98D443FDC3DB064F10436F27926" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" xlink:label="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_18AED6AA3546C0B228FFF10436F2A784" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_6C6139E939175713A1E1F10436F1B01C" xlink:to="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_18AED6AA3546C0B228FFF10436F2A784" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_5447D27EA551207FEEA1F10436E3D88E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_F3F054FD32732505EF83F10436E1A638" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_5447D27EA551207FEEA1F10436E3D88E" xlink:to="loc_us-gaap_StatementTable_F3F054FD32732505EF83F10436E1A638" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_5760EF0C6DFBEAE943AAF10436E1C4B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_F3F054FD32732505EF83F10436E1A638" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_5760EF0C6DFBEAE943AAF10436E1C4B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7FCE2092A1067E084A30F10436E240FB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_5760EF0C6DFBEAE943AAF10436E1C4B0" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7FCE2092A1067E084A30F10436E240FB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7FCE2092A1067E084A30F10436E240FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_5760EF0C6DFBEAE943AAF10436E1C4B0" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7FCE2092A1067E084A30F10436E240FB" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember" xlink:label="loc_trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember_D015240ED9E3B552DD3EF10436E292C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7FCE2092A1067E084A30F10436E240FB" xlink:to="loc_trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember_D015240ED9E3B552DD3EF10436E292C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_78F766285896CC1BDC21F10436E20A3D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_F3F054FD32732505EF83F10436E1A638" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_78F766285896CC1BDC21F10436E20A3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_B1B6A7C4876D884BEFD0F10436E2962F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_78F766285896CC1BDC21F10436E20A3D" xlink:to="loc_us-gaap_EquityComponentDomain_B1B6A7C4876D884BEFD0F10436E2962F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_B1B6A7C4876D884BEFD0F10436E2962F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_78F766285896CC1BDC21F10436E20A3D" xlink:to="loc_us-gaap_EquityComponentDomain_B1B6A7C4876D884BEFD0F10436E2962F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember" xlink:label="loc_us-gaap_RetainedEarningsUnappropriatedMember_57D9E497882E1E35A952F10436E38D25" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_B1B6A7C4876D884BEFD0F10436E2962F" xlink:to="loc_us-gaap_RetainedEarningsUnappropriatedMember_57D9E497882E1E35A952F10436E38D25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_9D9A826983B44EB9D530F10436E3CEF8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5447D27EA551207FEEA1F10436E3D88E" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_9D9A826983B44EB9D530F10436E3CEF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_8D615222C87C08EA9A14F10436E330CF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5447D27EA551207FEEA1F10436E3D88E" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_8D615222C87C08EA9A14F10436E330CF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProducts" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsFairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_F4714B19E540B195CD44F1043661C322" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:to="loc_srt_ConsolidatedEntitiesAxis_F4714B19E540B195CD44F1043661C322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_F14C40A6B311FCD441B7F1043661B76F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_F4714B19E540B195CD44F1043661C322" xlink:to="loc_srt_ConsolidatedEntitiesDomain_F14C40A6B311FCD441B7F1043661B76F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_F14C40A6B311FCD441B7F1043661B76F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_F4714B19E540B195CD44F1043661C322" xlink:to="loc_srt_ConsolidatedEntitiesDomain_F14C40A6B311FCD441B7F1043661B76F" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ConsolidatedInvestmentPortfoliosMember" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_DF0B9C3AF3E213F4E110F10436613106" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_F14C40A6B311FCD441B7F1043661B76F" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_DF0B9C3AF3E213F4E110F10436613106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_A751A921BBBD8FFA512FF10436624DD9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:to="loc_us-gaap_InvestmentTypeAxis_A751A921BBBD8FFA512FF10436624DD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_A751A921BBBD8FFA512FF10436624DD9" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_A751A921BBBD8FFA512FF10436624DD9" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_F3D128DDCAAC5C19A606F1043662E89F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5" xlink:to="loc_us-gaap_EquitySecuritiesMember_F3D128DDCAAC5C19A606F1043662E89F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FixedIncomeInvestmentsMember" xlink:label="loc_us-gaap_FixedIncomeInvestmentsMember_8CC8EC2076535D5F2EFDF10436625D80" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5" xlink:to="loc_us-gaap_FixedIncomeInvestmentsMember_8CC8EC2076535D5F2EFDF10436625D80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherThanSecuritiesInvestmentMember" xlink:label="loc_us-gaap_OtherThanSecuritiesInvestmentMember_84A5EE7FA4898B5C167BF104366201F6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_D9EC3C845696DDA95928F1043662AFA5" xlink:to="loc_us-gaap_OtherThanSecuritiesInvestmentMember_84A5EE7FA4898B5C167BF104366201F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_71CB4DE47E23F035A514F1043662DC61" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_71CB4DE47E23F035A514F1043662DC61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CE4C163483C0F8132091F10436638DEB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_71CB4DE47E23F035A514F1043662DC61" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CE4C163483C0F8132091F10436638DEB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CE4C163483C0F8132091F10436638DEB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_71CB4DE47E23F035A514F1043662DC61" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CE4C163483C0F8132091F10436638DEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_E957B4108F6D05C2C012F10436638E8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_CE4C163483C0F8132091F10436638DEB" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_E957B4108F6D05C2C012F10436638E8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_16DC47ABBA11EEAAEAF1F104366368ED" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E989DA726FBC93A02FFFF10436604D29" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_16DC47ABBA11EEAAEAF1F104366368ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_16DC47ABBA11EEAAEAF1F104366368ED" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_16DC47ABBA11EEAAEAF1F104366368ED" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_77EE678C3E95E3349A7BF1043664ACB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_77EE678C3E95E3349A7BF1043664ACB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_6A552A12F185693EAAD3F10436642BD4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3A9DE436A3C4ECBDDEB1F1043663F561" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_6A552A12F185693EAAD3F10436642BD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4F7C1AF54854E30036B9F10436643545" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4F7C1AF54854E30036B9F10436643545" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_F43060871F08167C5A11F1043664879B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_F43060871F08167C5A11F1043664879B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_4AD53E708628D315EA82F104366583F1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_4AD53E708628D315EA82F104366583F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_CC589CA4AE2E5681F382F10436658988" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_DEC7608393FDE7E8FF56F10436646020" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_CC589CA4AE2E5681F382F10436658988" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsNetAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedBalanceSheetStatementTable" xlink:label="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_B920ADC7EB5BB1031A3DF104367BFE3E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:to="loc_srt_ConsolidatedEntitiesAxis_B920ADC7EB5BB1031A3DF104367BFE3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_65F5E88F0382A9B1D7CEF104367CE124_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_B920ADC7EB5BB1031A3DF104367BFE3E" xlink:to="loc_srt_ConsolidatedEntitiesDomain_65F5E88F0382A9B1D7CEF104367CE124_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_65F5E88F0382A9B1D7CEF104367CE124" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_B920ADC7EB5BB1031A3DF104367BFE3E" xlink:to="loc_srt_ConsolidatedEntitiesDomain_65F5E88F0382A9B1D7CEF104367CE124" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ConsolidatedInvestmentPortfoliosMember" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_EF437F357EBCEB4F7C91F104367C0A47" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_65F5E88F0382A9B1D7CEF104367CE124" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_EF437F357EBCEB4F7C91F104367C0A47" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VotingInterestEntitiesMember" xlink:label="loc_trow_VotingInterestEntitiesMember_6CB1F1520DBF691CF06DF104367CB3B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_EF437F357EBCEB4F7C91F104367C0A47" xlink:to="loc_trow_VotingInterestEntitiesMember_6CB1F1520DBF691CF06DF104367CB3B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_73BBFAA7C9249981D0EDF104367D3B6E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_EF437F357EBCEB4F7C91F104367C0A47" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_73BBFAA7C9249981D0EDF104367D3B6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_EA4C4B53F5389403A1CBF104367DF08B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:to="loc_srt_ConsolidationItemsAxis_EA4C4B53F5389403A1CBF104367DF08B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_C8E3AA4C23A049CFBABCF104367DFC67_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_EA4C4B53F5389403A1CBF104367DF08B" xlink:to="loc_srt_ConsolidationItemsDomain_C8E3AA4C23A049CFBABCF104367DFC67_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_C8E3AA4C23A049CFBABCF104367DFC67" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_EA4C4B53F5389403A1CBF104367DF08B" xlink:to="loc_srt_ConsolidationItemsDomain_C8E3AA4C23A049CFBABCF104367DFC67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember" xlink:label="loc_srt_ReportableLegalEntitiesMember_B3A8B15ACF9DC7CAE350F104367DB632" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_C8E3AA4C23A049CFBABCF104367DFC67" xlink:to="loc_srt_ReportableLegalEntitiesMember_B3A8B15ACF9DC7CAE350F104367DB632" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_9D174DF8C197F19F08EEF104367DA4A4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:to="loc_srt_MajorCustomersAxis_9D174DF8C197F19F08EEF104367DA4A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_CC39E332EF8A5D72A001F104367DF267_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_9D174DF8C197F19F08EEF104367DA4A4" xlink:to="loc_srt_NameOfMajorCustomerDomain_CC39E332EF8A5D72A001F104367DF267_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_CC39E332EF8A5D72A001F104367DF267" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_9D174DF8C197F19F08EEF104367DA4A4" xlink:to="loc_srt_NameOfMajorCustomerDomain_CC39E332EF8A5D72A001F104367DF267" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredInvestmentPortfoliosMember" xlink:label="loc_trow_SponsoredInvestmentPortfoliosMember_BFF9ECE6BCBF6972526FF104367EFE2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_CC39E332EF8A5D72A001F104367DF267" xlink:to="loc_trow_SponsoredInvestmentPortfoliosMember_BFF9ECE6BCBF6972526FF104367EFE2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_879CE4D497E5CA4B06A7F104367E0D3A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_231D8CC24962562F347BF104367B3932" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_879CE4D497E5CA4B06A7F104367E0D3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_49F221311D44FA754EB2F104367E04D6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_879CE4D497E5CA4B06A7F104367E0D3A" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_49F221311D44FA754EB2F104367E04D6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_49F221311D44FA754EB2F104367E04D6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_879CE4D497E5CA4B06A7F104367E0D3A" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_49F221311D44FA754EB2F104367E04D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_D451D736D04641B3FD10F104367E49E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_49F221311D44FA754EB2F104367E04D6" xlink:to="loc_us-gaap_MoneyMarketFundsMember_D451D736D04641B3FD10F104367E49E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_701903A27153E94A7693F104367F3AA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_701903A27153E94A7693F104367F3AA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_496D0B999839C96FF079F104367F7B50" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_Investments_496D0B999839C96FF079F104367F7B50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_20061F81856CCBC4B8D1F104367F1A88" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_OtherAssets_20061F81856CCBC4B8D1F104367F1A88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_7B9F691B276AB2D1C271F104367F5C1A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_Assets_7B9F691B276AB2D1C271F104367F5C1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_216EEA8B36369D7214ADF1043680C7BD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_Liabilities_216EEA8B36369D7214ADF1043680C7BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsNet" xlink:label="loc_us-gaap_AssetsNet_D74D08DE5AAFFA26EDF6F10436801C62" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_AssetsNet_D74D08DE5AAFFA26EDF6F10436801C62" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent" xlink:label="loc_trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent_D3440386CF080844E3ECF1043680FDB9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent_D3440386CF080844E3ECF1043680FDB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_C616762BAA3CDC1D9B8CF1043680344F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_B387A46EEB4312766198F104367F454D" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_C616762BAA3CDC1D9B8CF1043680344F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsOperatingResultsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedIncomeStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedIncomeStatementTable" xlink:label="loc_srt_CondensedIncomeStatementTable_75D4F874520A50548F861AD672882579" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_srt_CondensedIncomeStatementTable_75D4F874520A50548F861AD672882579" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_DFB91A6C24956C0335091AD67288B921" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_75D4F874520A50548F861AD672882579" xlink:to="loc_srt_ConsolidatedEntitiesAxis_DFB91A6C24956C0335091AD67288B921" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_7AD54DF8F664E8B69C541AD672895396_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_DFB91A6C24956C0335091AD67288B921" xlink:to="loc_srt_ConsolidatedEntitiesDomain_7AD54DF8F664E8B69C541AD672895396_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_7AD54DF8F664E8B69C541AD672895396" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_DFB91A6C24956C0335091AD67288B921" xlink:to="loc_srt_ConsolidatedEntitiesDomain_7AD54DF8F664E8B69C541AD672895396" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ConsolidatedInvestmentPortfoliosMember" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_1ECD3E3B3BF6EDF11ED21AD67289AB13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_7AD54DF8F664E8B69C541AD672895396" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_1ECD3E3B3BF6EDF11ED21AD67289AB13" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VotingInterestEntitiesMember" xlink:label="loc_trow_VotingInterestEntitiesMember_6953A162B2756D1CE5001AD67289537C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_1ECD3E3B3BF6EDF11ED21AD67289AB13" xlink:to="loc_trow_VotingInterestEntitiesMember_6953A162B2756D1CE5001AD67289537C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_45E26129A6DFA5B3EF641AD6728AC775" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_1ECD3E3B3BF6EDF11ED21AD67289AB13" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_45E26129A6DFA5B3EF641AD6728AC775" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_39EC13905F9057A0BC931AD6728AF87D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_75D4F874520A50548F861AD672882579" xlink:to="loc_srt_ConsolidationItemsAxis_39EC13905F9057A0BC931AD6728AF87D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_39EC13905F9057A0BC931AD6728AF87D" xlink:to="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_39EC13905F9057A0BC931AD6728AF87D" xlink:to="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember" xlink:label="loc_srt_ReportableLegalEntitiesMember_4F511B02E2ACBB53F2F81AD6728A6E93" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1" xlink:to="loc_srt_ReportableLegalEntitiesMember_4F511B02E2ACBB53F2F81AD6728A6E93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationEliminationsMember" xlink:label="loc_srt_ConsolidationEliminationsMember_CD43A6B6E70E039282531AD6728A09C7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_94ED8ECF4EC34664EE7C1AD6728A22E1" xlink:to="loc_srt_ConsolidationEliminationsMember_CD43A6B6E70E039282531AD6728A09C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_DB3E509EA9CF7B6004541AD6728BA8C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_us-gaap_OperatingExpenses_DB3E509EA9CF7B6004541AD6728BA8C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeNet" xlink:label="loc_us-gaap_InvestmentIncomeNet_AF68E0CF7B91C595F4331AEDE2D800ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_us-gaap_InvestmentIncomeNet_AF68E0CF7B91C595F4331AEDE2D800ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_710CE169F3C09748A9CE1AD6728B322B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_710CE169F3C09748A9CE1AD6728B322B" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent" xlink:label="loc_trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent_ACC918A276440B3FC5CE1AD6728B22AC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent_ACC918A276440B3FC5CE1AD6728B22AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_C0BB61F5A0DFCFFA67CF1AD6728C60A8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_C0BB61F5A0DFCFFA67CF1AD6728C60A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_C056E4B833981B45C0231AD6728CB8B2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_07E70829DFF9BBF328C41AD6728B6DD1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_C056E4B833981B45C0231AD6728CB8B2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsStatementOfCashFlowsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedCashFlowStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedCashFlowStatementTable" xlink:label="loc_srt_CondensedCashFlowStatementTable_17596CD2699C47529011F2B21A093CA1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_srt_CondensedCashFlowStatementTable_17596CD2699C47529011F2B21A093CA1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_21DF6DE07FC4C4DCBA24F2B21A0A79DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_17596CD2699C47529011F2B21A093CA1" xlink:to="loc_srt_ConsolidatedEntitiesAxis_21DF6DE07FC4C4DCBA24F2B21A0A79DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_A0B03D987D834677C059F2B21A0A6D91_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_21DF6DE07FC4C4DCBA24F2B21A0A79DB" xlink:to="loc_srt_ConsolidatedEntitiesDomain_A0B03D987D834677C059F2B21A0A6D91_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_A0B03D987D834677C059F2B21A0A6D91" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_21DF6DE07FC4C4DCBA24F2B21A0A79DB" xlink:to="loc_srt_ConsolidatedEntitiesDomain_A0B03D987D834677C059F2B21A0A6D91" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ConsolidatedInvestmentPortfoliosMember" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_A5D70F0C20693F7EC4A7F2B21A0B8187" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_A0B03D987D834677C059F2B21A0A6D91" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_A5D70F0C20693F7EC4A7F2B21A0B8187" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VotingInterestEntitiesMember" xlink:label="loc_trow_VotingInterestEntitiesMember_EBE03DC6297F5ED953F3F2B21A0BAF4A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_A5D70F0C20693F7EC4A7F2B21A0B8187" xlink:to="loc_trow_VotingInterestEntitiesMember_EBE03DC6297F5ED953F3F2B21A0BAF4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_73D74281F4317E167107F2B21A0B5AEA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_A5D70F0C20693F7EC4A7F2B21A0B8187" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_73D74281F4317E167107F2B21A0B5AEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_115FB1DA2808ACFC29BEF2B21A0C8C8B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_17596CD2699C47529011F2B21A093CA1" xlink:to="loc_srt_ConsolidationItemsAxis_115FB1DA2808ACFC29BEF2B21A0C8C8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_115FB1DA2808ACFC29BEF2B21A0C8C8B" xlink:to="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_115FB1DA2808ACFC29BEF2B21A0C8C8B" xlink:to="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember" xlink:label="loc_srt_ReportableLegalEntitiesMember_FC7D055BCFEDE96AD5BCF2B21A0D620F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040" xlink:to="loc_srt_ReportableLegalEntitiesMember_FC7D055BCFEDE96AD5BCF2B21A0D620F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationEliminationsMember" xlink:label="loc_srt_ConsolidationEliminationsMember_02A57E101FA930FB02ABF2B21A0DA29A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_B98E71EC3F295C1EE853F2B21A0C6040" xlink:to="loc_srt_ConsolidationEliminationsMember_02A57E101FA930FB02ABF2B21A0DA29A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BA758A4CD8E0FFB686CF2B21A0D5718" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6BA758A4CD8E0FFB686CF2B21A0D5718" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_A55D62DF4667B7B74179F2B21A0E0D91" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_A55D62DF4667B7B74179F2B21A0E0D91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_BA5482FC041EA7C84CF2F2B21A132B1D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_BA5482FC041EA7C84CF2F2B21A132B1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_239A2C4F17825BA0F218F2D2CACA9EF9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_239A2C4F17825BA0F218F2D2CACA9EF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3F0FD60A1CB9D1951928F2D24D850FD9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3F0FD60A1CB9D1951928F2D24D850FD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0A0BE9DCEEDBAC389642F2D33BC47E03" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_E02A62C048BC58EF653AF2B21A0DDE1B" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0A0BE9DCEEDBAC389642F2D33BC47E03" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/ConsolidatedTRowePriceInvestmentProductsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/Cover" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/DellAppraisalRightsMatter" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/DellAppraisalRightsMatterDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemLineItems" xlink:label="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemTable" xlink:label="loc_us-gaap_UnusualOrInfrequentItemTable_C61A93FAABFF7BDCD15B1AD671BA1EEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:to="loc_us-gaap_UnusualOrInfrequentItemTable_C61A93FAABFF7BDCD15B1AD671BA1EEC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemAxis" xlink:label="loc_us-gaap_UnusualOrInfrequentItemAxis_D5763E0CFA35B38C759E1AD671BA91F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_C61A93FAABFF7BDCD15B1AD671BA1EEC" xlink:to="loc_us-gaap_UnusualOrInfrequentItemAxis_D5763E0CFA35B38C759E1AD671BA91F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemDomain" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_95B6AD72914551928D381AD671BA6786_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_D5763E0CFA35B38C759E1AD671BA91F0" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_95B6AD72914551928D381AD671BA6786_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemDomain" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_95B6AD72914551928D381AD671BA6786" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_D5763E0CFA35B38C759E1AD671BA91F0" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_95B6AD72914551928D381AD671BA6786" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DellappraisalrightsmatterMember" xlink:label="loc_trow_DellappraisalrightsmatterMember_D0642C8E545EDBF98B281AD671BBC527" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemDomain_95B6AD72914551928D381AD671BA6786" xlink:to="loc_trow_DellappraisalrightsmatterMember_D0642C8E545EDBF98B281AD671BBC527" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemLossGross" xlink:label="loc_us-gaap_UnusualOrInfrequentItemLossGross_DC11B315DF3BA2FE520E1AD671BB3B57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:to="loc_us-gaap_UnusualOrInfrequentItemLossGross_DC11B315DF3BA2FE520E1AD671BB3B57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemInsuranceProceeds" xlink:label="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_034B65D7EA09D568328F1AD671BB4D24" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:to="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_034B65D7EA09D568328F1AD671BB4D24" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_UnusualOrInfrequentItemOrBothLossReversal" xlink:label="loc_trow_UnusualOrInfrequentItemOrBothLossReversal_93FBEBB71736E638FBCE1AEBD2ED35A1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:to="loc_trow_UnusualOrInfrequentItemOrBothLossReversal_93FBEBB71736E638FBCE1AEBD2ED35A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_8E81B07CFBB8FEFF548C1AD671BB1E00" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_E74AEEF059640DFFCDE61AD671BB7643" xlink:to="loc_us-gaap_OperatingExpenses_8E81B07CFBB8FEFF548C1AD671BB1E00" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/EarningsPerShareCalculations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/EarningsPerShareCalculationsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/EarningsPerShareCalculationsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FD4EF493882F4A0F1202F104368DB4AC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E29496B574DDEEBEE322F104368A5921" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FD4EF493882F4A0F1202F104368DB4AC" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E29496B574DDEEBEE322F104368A5921" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_963DC5DC6C79BE54A3ABF104368AECA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E29496B574DDEEBEE322F104368A5921" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_963DC5DC6C79BE54A3ABF104368AECA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_AA371D8BD513E3C8A9B2F104368B3274_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_963DC5DC6C79BE54A3ABF104368AECA5" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_AA371D8BD513E3C8A9B2F104368B3274_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_AA371D8BD513E3C8A9B2F104368B3274" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_963DC5DC6C79BE54A3ABF104368AECA5" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_AA371D8BD513E3C8A9B2F104368B3274" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredInvestmentPortfoliosMember" xlink:label="loc_trow_SponsoredInvestmentPortfoliosMember_87758645DF15518A4ECAF104368B1DC7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_AA371D8BD513E3C8A9B2F104368B3274" xlink:to="loc_trow_SponsoredInvestmentPortfoliosMember_87758645DF15518A4ECAF104368B1DC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6FA4A87579CD86C3DF90F104368B5BB5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E29496B574DDEEBEE322F104368A5921" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6FA4A87579CD86C3DF90F104368B5BB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6FA4A87579CD86C3DF90F104368B5BB5" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6FA4A87579CD86C3DF90F104368B5BB5" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_1C12990067A02B783023F104368C566B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_1C12990067A02B783023F104368C566B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_B1DF98192F8BBF9FD808F104368C7FF2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_B1DF98192F8BBF9FD808F104368C7FF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_57F7518FE2CE867CF018F104368C3B84" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F53348326F10E63C15D3F104368BE90D" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_57F7518FE2CE867CF018F104368C3B84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2D5C211AA55978A47ABEF104368C1007" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_E29496B574DDEEBEE322F104368A5921" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2D5C211AA55978A47ABEF104368C1007" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_900338861C072029A069F104368C5577_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2D5C211AA55978A47ABEF104368C1007" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_900338861C072029A069F104368C5577_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_900338861C072029A069F104368C5577" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_2D5C211AA55978A47ABEF104368C1007" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_900338861C072029A069F104368C5577" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_D9471D3F7A77B5C44977F104368DA847" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_900338861C072029A069F104368C5577" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_D9471D3F7A77B5C44977F104368DA847" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_76078A608DCAD4BC24D6F104368DB228" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FD4EF493882F4A0F1202F104368DB4AC" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_76078A608DCAD4BC24D6F104368DB228" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_2A1164E5D85ED80165E3F104368DD695" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FD4EF493882F4A0F1202F104368DB4AC" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_2A1164E5D85ED80165E3F104368DD695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_852B7E7EEF3B64061657F104368D80C3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FD4EF493882F4A0F1202F104368DB4AC" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_852B7E7EEF3B64061657F104368D80C3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesChangesInUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesDeferredIncomeTaxesTaxBenefitsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="trow-20191231.xsd#trow_IncomeTaxReformLineItems" xlink:label="loc_trow_IncomeTaxReformLineItems_256B8447980B6160D823104A425613F0" xlink:type="locator" />
    <link:loc xlink:href="trow-20191231.xsd#trow_IncomeTaxReformTable" xlink:label="loc_trow_IncomeTaxReformTable_18BF2130EF64B21ADA06104A4255A374" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_trow_IncomeTaxReformLineItems_256B8447980B6160D823104A425613F0" xlink:to="loc_trow_IncomeTaxReformTable_18BF2130EF64B21ADA06104A4255A374" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_1BAA2B13DD36CE80F5AB104A425577D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_IncomeTaxReformTable_18BF2130EF64B21ADA06104A4255A374" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_1BAA2B13DD36CE80F5AB104A425577D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_ACB5BE82BCD18A8D79F9104A4255BE16_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_1BAA2B13DD36CE80F5AB104A425577D4" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_ACB5BE82BCD18A8D79F9104A4255BE16_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_ACB5BE82BCD18A8D79F9104A4255BE16" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_1BAA2B13DD36CE80F5AB104A425577D4" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_ACB5BE82BCD18A8D79F9104A4255BE16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_648C11CFD852DE84DE5B104A4255C2C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ACB5BE82BCD18A8D79F9104A4255BE16" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_648C11CFD852DE84DE5B104A4255C2C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_7679FE191BCA45DB7A20104A425644B5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_IncomeTaxReformTable_18BF2130EF64B21ADA06104A4255A374" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_7679FE191BCA45DB7A20104A425644B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_AF6F7B90B8F887CE9C7B104A4256342B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_7679FE191BCA45DB7A20104A425644B5" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_AF6F7B90B8F887CE9C7B104A4256342B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_AF6F7B90B8F887CE9C7B104A4256342B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_7679FE191BCA45DB7A20104A425644B5" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_AF6F7B90B8F887CE9C7B104A4256342B" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ComptrollerOfMarylandMember" xlink:label="loc_trow_ComptrollerOfMarylandMember_809E56B77AD81D5DCBF9104A42561048" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_AF6F7B90B8F887CE9C7B104A4256342B" xlink:to="loc_trow_ComptrollerOfMarylandMember_809E56B77AD81D5DCBF9104A42561048" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_D55C7764141F64426A8E104A4256B484" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_IncomeTaxReformLineItems_256B8447980B6160D823104A425613F0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_D55C7764141F64426A8E104A4256B484" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DeferredTaxLiabilitiesForIntendedRepatriation" xlink:label="loc_trow_DeferredTaxLiabilitiesForIntendedRepatriation_F8322E286F44373FC30B106298DD0A3C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_IncomeTaxReformLineItems_256B8447980B6160D823104A425613F0" xlink:to="loc_trow_DeferredTaxLiabilitiesForIntendedRepatriation_F8322E286F44373FC30B106298DD0A3C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesNetDeferredTaxAssetsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServices" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesInvestmentAdvisoryServicesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_C1DE22F55A4A4DBFBB6A1AF93C37D8BB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_29100BA5260843F0121D1AF93C2A5C1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_C1DE22F55A4A4DBFBB6A1AF93C37D8BB" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_29100BA5260843F0121D1AF93C2A5C1C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_84C76B72CB3C32A43B1A1AD6734DB698" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_29100BA5260843F0121D1AF93C2A5C1C" xlink:to="loc_srt_ProductOrServiceAxis_84C76B72CB3C32A43B1A1AD6734DB698" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_84C76B72CB3C32A43B1A1AD6734DB698" xlink:to="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_84C76B72CB3C32A43B1A1AD6734DB698" xlink:to="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetManagement1Member" xlink:label="loc_us-gaap_AssetManagement1Member_77540DB9DFF6A5661A481AD6734DDFA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371" xlink:to="loc_us-gaap_AssetManagement1Member_77540DB9DFF6A5661A481AD6734DDFA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdministrativeServiceMember" xlink:label="loc_us-gaap_AdministrativeServiceMember_47A07ADCDFA6C8AFDBCA1AD6734E28DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371" xlink:to="loc_us-gaap_AdministrativeServiceMember_47A07ADCDFA6C8AFDBCA1AD6734E28DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DistributionServiceMember" xlink:label="loc_us-gaap_DistributionServiceMember_AFE73BC3BC94E34AC00E1AD6734E9D8E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_83B04B2DE391DF595D1C1AD6734DC371" xlink:to="loc_us-gaap_DistributionServiceMember_AFE73BC3BC94E34AC00E1AD6734E9D8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_CC8FD54BA943A52C7D3A1AD6734EA919" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_29100BA5260843F0121D1AF93C2A5C1C" xlink:to="loc_srt_MajorCustomersAxis_CC8FD54BA943A52C7D3A1AD6734EA919" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_CC8FD54BA943A52C7D3A1AD6734EA919" xlink:to="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_CC8FD54BA943A52C7D3A1AD6734EA919" xlink:to="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredMutualFundsInUSMember" xlink:label="loc_trow_SponsoredMutualFundsInUSMember_9502588FBDD7614116EB1AD6734F8D98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308" xlink:to="loc_trow_SponsoredMutualFundsInUSMember_9502588FBDD7614116EB1AD6734F8D98" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SubadvisedSeparateAccountsAndOtherInvestmentProductsMember" xlink:label="loc_trow_SubadvisedSeparateAccountsAndOtherInvestmentProductsMember_62DDC54AA9FB385D66091AD6734F2F44" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308" xlink:to="loc_trow_SubadvisedSeparateAccountsAndOtherInvestmentProductsMember_62DDC54AA9FB385D66091AD6734F2F44" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherClientsMember" xlink:label="loc_trow_OtherClientsMember_2EBDC0BF21B031D263851AD6734F5E47" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_04E1ACA27396949DFF641AD6734E2308" xlink:to="loc_trow_OtherClientsMember_2EBDC0BF21B031D263851AD6734F5E47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_45C827E4FB4CD8E637391AD6734F2519" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_29100BA5260843F0121D1AF93C2A5C1C" xlink:to="loc_us-gaap_InvestmentTypeAxis_45C827E4FB4CD8E637391AD6734F2519" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_45C827E4FB4CD8E637391AD6734F2519" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_45C827E4FB4CD8E637391AD6734F2519" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockAndBlendedAssetMember" xlink:label="loc_trow_StockAndBlendedAssetMember_320EC74EA069417D9BB21AD67350B8D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF" xlink:to="loc_trow_StockAndBlendedAssetMember_320EC74EA069417D9BB21AD67350B8D0" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_BondAndMoneyMarketMember" xlink:label="loc_trow_BondAndMoneyMarketMember_9ED0607D4CECEEFD33191AD673500CF9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_8FE5421E361C0FB7F9E51AD6735070CF" xlink:to="loc_trow_BondAndMoneyMarketMember_9ED0607D4CECEEFD33191AD673500CF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_7AA7BF5D82ACD9FF778A1AD673502ACA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_C1DE22F55A4A4DBFBB6A1AF93C37D8BB" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_7AA7BF5D82ACD9FF778A1AD673502ACA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsUnderManagementAverageBalance" xlink:label="loc_us-gaap_AssetsUnderManagementAverageBalance_67B9F49E5EFADDDC9E1F1AD673515F6A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_C1DE22F55A4A4DBFBB6A1AF93C37D8BB" xlink:to="loc_us-gaap_AssetsUnderManagementAverageBalance_67B9F49E5EFADDDC9E1F1AD673515F6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsUnderManagementCarryingAmount" xlink:label="loc_us-gaap_AssetsUnderManagementCarryingAmount_5A62C8AFDB122BBBAB5D1AD67351F806" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_C1DE22F55A4A4DBFBB6A1AF93C37D8BB" xlink:to="loc_us-gaap_AssetsUnderManagementCarryingAmount_5A62C8AFDB122BBBAB5D1AD67351F806" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesServicesConcentrationAndReceivablesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_AF749C8EA775880C2F61F10436B1056B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTable" xlink:label="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_AF749C8EA775880C2F61F10436B1056B" xlink:to="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_A138D987F3B623F90580F10436AED750" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:to="loc_srt_StatementGeographicalAxis_A138D987F3B623F90580F10436AED750" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_40F4722492FE76A10047F10436AED673_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_A138D987F3B623F90580F10436AED750" xlink:to="loc_srt_SegmentGeographicalDomain_40F4722492FE76A10047F10436AED673_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_40F4722492FE76A10047F10436AED673" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_A138D987F3B623F90580F10436AED750" xlink:to="loc_srt_SegmentGeographicalDomain_40F4722492FE76A10047F10436AED673" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_7F9DAEF6764C4E466FE1F10436AEEED0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_40F4722492FE76A10047F10436AED673" xlink:to="loc_us-gaap_NonUsMember_7F9DAEF6764C4E466FE1F10436AEEED0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_38C3D95C263CEDEFA1C2F10436AEFBFE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_38C3D95C263CEDEFA1C2F10436AEFBFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1208ABE2C9282D5E57D2F10436AF60AD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_38C3D95C263CEDEFA1C2F10436AEFBFE" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1208ABE2C9282D5E57D2F10436AF60AD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1208ABE2C9282D5E57D2F10436AF60AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_38C3D95C263CEDEFA1C2F10436AEFBFE" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1208ABE2C9282D5E57D2F10436AF60AD" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AssetsUnderManagementMember" xlink:label="loc_trow_AssetsUnderManagementMember_D066A7F83BC3BC504D8FF10436AF9E30" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1208ABE2C9282D5E57D2F10436AF60AD" xlink:to="loc_trow_AssetsUnderManagementMember_D066A7F83BC3BC504D8FF10436AF9E30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_0F212E067D09FA8F8B0DF10436AF24DF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:to="loc_srt_MajorCustomersAxis_0F212E067D09FA8F8B0DF10436AF24DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_0F212E067D09FA8F8B0DF10436AF24DF" xlink:to="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_0F212E067D09FA8F8B0DF10436AF24DF" xlink:to="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentAdvisoryClientsMember" xlink:label="loc_trow_InvestmentAdvisoryClientsMember_5730F21B2DFF3E3E7334F10436B00233" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F" xlink:to="loc_trow_InvestmentAdvisoryClientsMember_5730F21B2DFF3E3E7334F10436B00233" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredInvestmentPortfoliosMember" xlink:label="loc_trow_SponsoredInvestmentPortfoliosMember_8DACB6A1415B8009B845F10436B0963C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_6146445FA6827334E301F10436AFA70F" xlink:to="loc_trow_SponsoredInvestmentPortfoliosMember_8DACB6A1415B8009B845F10436B0963C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_8301350BE25AD6D303F1F10436B0A31A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_CCB5B250CAA2CE12AB8BF10436ADA05C" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_8301350BE25AD6D303F1F10436B0A31A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_B354549014C8C37BCF94F10436B0C59F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_8301350BE25AD6D303F1F10436B0A31A" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_B354549014C8C37BCF94F10436B0C59F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_B354549014C8C37BCF94F10436B0C59F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_8301350BE25AD6D303F1F10436B0A31A" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_B354549014C8C37BCF94F10436B0C59F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeographicConcentrationRiskMember" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_B6C4662E359410043BD6F10436B07E19" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_B354549014C8C37BCF94F10436B0C59F" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_B6C4662E359410043BD6F10436B07E19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_1DA9A9BDFBFB2BC6745FF10436B107EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_AF749C8EA775880C2F61F10436B1056B" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_1DA9A9BDFBFB2BC6745FF10436B107EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2FF25F3DDBF3BC65434F10436B1FD08" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_AF749C8EA775880C2F61F10436B1056B" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2FF25F3DDBF3BC65434F10436B1FD08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaap_AccountsReceivableNet_645E01F8D2D234C6E80FF10436B1C87A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_AF749C8EA775880C2F61F10436B1056B" xlink:to="loc_us-gaap_AccountsReceivableNet_645E01F8D2D234C6E80FF10436B1C87A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InformationAboutReceivablesRevenuesAndServicesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/Investments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InvestmentsInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentLineItems" xlink:label="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentTable" xlink:label="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_EBFE6FE8225EA3620FB81AD67305DEEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_EBFE6FE8225EA3620FB81AD67305DEEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_EBFE6FE8225EA3620FB81AD67305DEEF" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_EBFE6FE8225EA3620FB81AD67305DEEF" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredInvestmentPortfoliosMember" xlink:label="loc_trow_SponsoredInvestmentPortfoliosMember_84F530CEAAC1E797FD521AD67305395B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:to="loc_trow_SponsoredInvestmentPortfoliosMember_84F530CEAAC1E797FD521AD67305395B" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SponsoredInvestmentPortfoliosDesignatedAsEconomicHedgeOfSupplementalSavingsPlanLiabilityMember" xlink:label="loc_trow_SponsoredInvestmentPortfoliosDesignatedAsEconomicHedgeOfSupplementalSavingsPlanLiabilityMember_9E01D846568C17D96B211AD673063326" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_SponsoredInvestmentPortfoliosMember_84F530CEAAC1E797FD521AD67305395B" xlink:to="loc_trow_SponsoredInvestmentPortfoliosDesignatedAsEconomicHedgeOfSupplementalSavingsPlanLiabilityMember_9E01D846568C17D96B211AD673063326" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentPartnershipandOtherInvestmentsMember" xlink:label="loc_trow_InvestmentPartnershipandOtherInvestmentsMember_BF50FD5A11D854FC75311AD67306B3B0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:to="loc_trow_InvestmentPartnershipandOtherInvestmentsMember_BF50FD5A11D854FC75311AD67306B3B0" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_UtiAssetManagementCompanyIndiaMember" xlink:label="loc_trow_UtiAssetManagementCompanyIndiaMember_CB756D1E53E3D3698C841AD673066CBB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:to="loc_trow_UtiAssetManagementCompanyIndiaMember_CB756D1E53E3D3698C841AD673066CBB" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_OtherEquityMethodInvestmentsMember" xlink:label="loc_trow_OtherEquityMethodInvestmentsMember_0102AB7FD46AF1B2E1F21AD673062096" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:to="loc_trow_OtherEquityMethodInvestmentsMember_0102AB7FD46AF1B2E1F21AD673062096" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DaiwaSBInvestmentsLtdMember" xlink:label="loc_trow_DaiwaSBInvestmentsLtdMember_F920928E4B7DC78ACC031AD673077E55" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_95A1F9A1B5D3BD2719FD1AD67305E134" xlink:to="loc_trow_DaiwaSBInvestmentsLtdMember_F920928E4B7DC78ACC031AD673077E55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_86C61AA7CFA20B3BA6901AD67307D217" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_86C61AA7CFA20B3BA6901AD67307D217" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_86C61AA7CFA20B3BA6901AD67307D217" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_86C61AA7CFA20B3BA6901AD67307D217" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsMember" xlink:label="loc_us-gaap_AssetsMember_716760D78B7387FCC57C1AD67307EF79" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5" xlink:to="loc_us-gaap_AssetsMember_716760D78B7387FCC57C1AD67307EF79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilityMember" xlink:label="loc_us-gaap_LiabilityMember_1299F6CCD032D1A5F2A31AD67307AED7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5" xlink:to="loc_us-gaap_LiabilityMember_1299F6CCD032D1A5F2A31AD67307AED7" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_RedeemableNoncontrollingInterestMember" xlink:label="loc_trow_RedeemableNoncontrollingInterestMember_0EE0AE27249DC6B09ADB1AD67307BDB9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_AE83E1390E2360CEFB7E1AD67307FDE5" xlink:to="loc_trow_RedeemableNoncontrollingInterestMember_0EE0AE27249DC6B09ADB1AD67307BDB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_E8D3F14EA3FC84C295311AD67308F20B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_E8D3F14EA3FC84C295311AD67308F20B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3A8908BF6665FEAAD8171AD673087CF2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_E8D3F14EA3FC84C295311AD67308F20B" xlink:to="loc_us-gaap_EquityComponentDomain_3A8908BF6665FEAAD8171AD673087CF2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3A8908BF6665FEAAD8171AD673087CF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_E8D3F14EA3FC84C295311AD67308F20B" xlink:to="loc_us-gaap_EquityComponentDomain_3A8908BF6665FEAAD8171AD673087CF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_6319EB71E39F8A1AE3701AD67308A8A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3A8908BF6665FEAAD8171AD673087CF2" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_6319EB71E39F8A1AE3701AD67308A8A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4404687A0E529B37D1801AD6730849BE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_F10E8A9E1D9A7CA87F5A1AD67304B011" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4404687A0E529B37D1801AD6730849BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_EB0334B401AFBEFE051D1AD673093237_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4404687A0E529B37D1801AD6730849BE" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_EB0334B401AFBEFE051D1AD673093237_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_EB0334B401AFBEFE051D1AD673093237" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4404687A0E529B37D1801AD6730849BE" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_EB0334B401AFBEFE051D1AD673093237" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_664606DA84B3C081D7C01AD67309E63B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_EB0334B401AFBEFE051D1AD673093237" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_664606DA84B3C081D7C01AD67309E63B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_14F4EFB1998863519F831AD673091868" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_14F4EFB1998863519F831AD673091868" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_BAC3BBC7DD45068B96F61AD6730A1F0A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_EquityMethodInvestments_BAC3BBC7DD45068B96F61AD6730A1F0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_039B47F8EA44EF6BB4D51AD6730A2AB8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_HeldToMaturitySecurities_039B47F8EA44EF6BB4D51AD6730A2AB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_7E9E48115F257770D53C1AD6730AC4A3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_Investments_7E9E48115F257770D53C1AD6730AC4A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_4520207F03BB634780491AD6730ACC33" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_4520207F03BB634780491AD6730ACC33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_1E5A7CACECEBDD4BD5301AD6730AC7AB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_1E5A7CACECEBDD4BD5301AD6730AC7AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeDividend" xlink:label="loc_us-gaap_InvestmentIncomeDividend_7AE9B9D457544CE99C871AD6730BEF9A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_InvestmentIncomeDividend_7AE9B9D457544CE99C871AD6730BEF9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_A6D3D7767260882D2CF81AFB58AE1929" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_A6D3D7767260882D2CF81AFB58AE1929" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeconsolidationGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationGainOrLossAmount_5DF9D27B2B81567C024D1AFBBF1B0967" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_us-gaap_DeconsolidationGainOrLossAmount_5DF9D27B2B81567C024D1AFBBF1B0967" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentsOwnershipInterestPercentage" xlink:label="loc_trow_InvestmentsOwnershipInterestPercentage_5C88172AF958617E6AF61AD6730BB86D" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_C9468BC8FF81F816D4361AD67309F6A7" xlink:to="loc_trow_InvestmentsOwnershipInterestPercentage_5C88172AF958617E6AF61AD6730BB86D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InvestmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/InvestmentsVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_206285E99DF06859E701F1043696E451" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_206285E99DF06859E701F1043696E451" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_C39E21004A14869E0C08F10436961BB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_206285E99DF06859E701F1043696E451" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_C39E21004A14869E0C08F10436961BB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_B1A7C5729138E654A6DEF1043697FED8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_C39E21004A14869E0C08F10436961BB3" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_B1A7C5729138E654A6DEF1043697FED8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_B1A7C5729138E654A6DEF1043697FED8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_C39E21004A14869E0C08F10436961BB3" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_B1A7C5729138E654A6DEF1043697FED8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_CA54D394812834BC65C0F1043697DA6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_B1A7C5729138E654A6DEF1043697FED8" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_CA54D394812834BC65C0F1043697DA6E" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount_3C91A1D74058994B8B36F10436970DA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount_3C91A1D74058994B8B36F10436970DA2" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_63968A52D47DFC3507C3F1043697C6DC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_63968A52D47DFC3507C3F1043697C6DC" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUncollectedInvestmentAdvisoryandAdministrativeFeesAmount" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUncollectedInvestmentAdvisoryandAdministrativeFeesAmount_EDEB08CBC7B0044B6997F1043698F7D6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUncollectedInvestmentAdvisoryandAdministrativeFeesAmount_EDEB08CBC7B0044B6997F1043698F7D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_803796EC55DDE6815076F1043698D49C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_3381F7BCDC8CC282E549F1043697E908" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_803796EC55DDE6815076F1043698D49C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/Leases" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LeasesAdditionalInformationDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LeasesScheduleOfFutureMinimumLeasePaymentsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LeasesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncome" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_F9D16A0FC7A17E5037DFF10435D6F3F8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_824572EFA94C2C082345F10435D32A0B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_F9D16A0FC7A17E5037DFF10435D6F3F8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_824572EFA94C2C082345F10435D32A0B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_D136CB497B090F6419A0F10435D31B07" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_824572EFA94C2C082345F10435D32A0B" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_D136CB497B090F6419A0F10435D31B07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D136CB497B090F6419A0F10435D31B07" xlink:to="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D136CB497B090F6419A0F10435D31B07" xlink:to="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_72FA5370AB6D27868A29F10435D4B951" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_72FA5370AB6D27868A29F10435D4B951" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_E4E2439000939DA2073AF10435D4A709" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_E4E2439000939DA2073AF10435D4A709" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_712940ABFE8004484563F10435D4C5C4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_712940ABFE8004484563F10435D4C5C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember" xlink:label="loc_us-gaap_RetainedEarningsUnappropriatedMember_7A5BECE05F8BB2A00A8EF10435D4F81A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6A439F2F16F3B9D1675AF10435D3D0B6" xlink:to="loc_us-gaap_RetainedEarningsUnappropriatedMember_7A5BECE05F8BB2A00A8EF10435D4F81A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_71F92B0AA0BA12947255F10435D4CF08" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_824572EFA94C2C082345F10435D32A0B" xlink:to="loc_srt_ConsolidatedEntitiesAxis_71F92B0AA0BA12947255F10435D4CF08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_71F92B0AA0BA12947255F10435D4CF08" xlink:to="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_71F92B0AA0BA12947255F10435D4CF08" xlink:to="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvesteeMember" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_4F4513C9034544125C9EF10435D5088C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_4F4513C9034544125C9EF10435D5088C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_B71F6BE47543A1F53DFEF10435D5ED7B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_F99B5357EA2AE1FEBE3CF10435D571DF" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_B71F6BE47543A1F53DFEF10435D5ED7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_A8E7E18A4FC15CCFDD23F10435D5881C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_824572EFA94C2C082345F10435D32A0B" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_A8E7E18A4FC15CCFDD23F10435D5881C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_A8E7E18A4FC15CCFDD23F10435D5881C" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_A8E7E18A4FC15CCFDD23F10435D5881C" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_9F557C370C0EC7BB6D7BF10435D647FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_9F557C370C0EC7BB6D7BF10435D647FA" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember" xlink:label="loc_trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember_902A33125D995B8692F5F10435D65946" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2" xlink:to="loc_trow_AccountingStandardsUpdate201802CurrencyTranslationAdjustmentsMember_902A33125D995B8692F5F10435D65946" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember" xlink:label="loc_trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember_E9B62F182FD10ED2AFB2F10435D696DE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7914625565F5CBC0A55BF10435D5C3C2" xlink:to="loc_trow_AccountingStandardsUpdate201802AvailableforSaleSecuritiesMember_E9B62F182FD10ED2AFB2F10435D696DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_F9D16A0FC7A17E5037DFF10435D6F3F8" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_11689C8485F19C503A9EF10435D703A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_StockholdersEquity_11689C8485F19C503A9EF10435D703A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_73620EA098326CA9453CF10435D78DC1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_73620EA098326CA9453CF10435D78DC1" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_StockholdersEquityAttributabletoParentAdjustedBalance" xlink:label="loc_trow_StockholdersEquityAttributabletoParentAdjustedBalance_3A4804773777796DE654F10435D78F83" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_trow_StockholdersEquityAttributabletoParentAdjustedBalance_3A4804773777796DE654F10435D78F83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_CE95648B23899F4D2AECF10435D78D0B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_CE95648B23899F4D2AECF10435D78D0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_06F40C05AA87095C222AF10435D7C13B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_06F40C05AA87095C222AF10435D7C13B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_B9075EEADCC32173D120F10435D8DA4F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_B9075EEADCC32173D120F10435D8DA4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_D62E9372C39FB8B9866AF10435D821EB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_D62E9372C39FB8B9866AF10435D821EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_842EFE50237B192E7EEAF10435D8B2C1" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_D47E474B9940CF928B26F10435D64D1D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_842EFE50237B192E7EEAF10435D8B2C1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeDeferredTaxBenefitsIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_AD6A893DE4E0943B9359F10435E0E9A0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_7E0607C1875AF08379A7F10435DEF607" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_AD6A893DE4E0943B9359F10435E0E9A0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_7E0607C1875AF08379A7F10435DEF607" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_BAD8ADAF81DFEC0FFBDBF10435DE5108" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_7E0607C1875AF08379A7F10435DEF607" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_BAD8ADAF81DFEC0FFBDBF10435DE5108" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BAD8ADAF81DFEC0FFBDBF10435DE5108" xlink:to="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BAD8ADAF81DFEC0FFBDBF10435DE5108" xlink:to="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_454D849A76C5A83FE598F10435DF461E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_454D849A76C5A83FE598F10435DF461E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_397DAFE856D91FC32D90F10435DF2078" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_397DAFE856D91FC32D90F10435DF2078" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccumulatedNetInvestmentGainLossCapitalGainsLossesDistributionsAttributabletoParentMember" xlink:label="loc_trow_AccumulatedNetInvestmentGainLossCapitalGainsLossesDistributionsAttributabletoParentMember_D7206BB9C516C09084DBF10435DF03F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_397DAFE856D91FC32D90F10435DF2078" xlink:to="loc_trow_AccumulatedNetInvestmentGainLossCapitalGainsLossesDistributionsAttributabletoParentMember_D7206BB9C516C09084DBF10435DF03F8" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccumulatedNetInvestmentGainLossNetGainsLossesRealizedonDispositionsofSecuritiesAttributabletoParentMember" xlink:label="loc_trow_AccumulatedNetInvestmentGainLossNetGainsLossesRealizedonDispositionsofSecuritiesAttributabletoParentMember_2926F03F2E55852721DBF10435E00467" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_397DAFE856D91FC32D90F10435DF2078" xlink:to="loc_trow_AccumulatedNetInvestmentGainLossNetGainsLossesRealizedonDispositionsofSecuritiesAttributabletoParentMember_2926F03F2E55852721DBF10435E00467" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_AccumulatedNetInvestmentGainLossNetGainsLossesRecognizedonTransfertoTradingSecuritiesAttributabletoParentMember" xlink:label="loc_trow_AccumulatedNetInvestmentGainLossNetGainsLossesRecognizedonTransfertoTradingSecuritiesAttributabletoParentMember_198D2189FE188E958736F10435E03C02" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_397DAFE856D91FC32D90F10435DF2078" xlink:to="loc_trow_AccumulatedNetInvestmentGainLossNetGainsLossesRecognizedonTransfertoTradingSecuritiesAttributabletoParentMember_198D2189FE188E958736F10435E03C02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_15D7353C2BC1F0AA15EAF10435E0CE5F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2B01CDAF9BC6B4817E3EF10435DF6BEB" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_15D7353C2BC1F0AA15EAF10435E0CE5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_81C55EECC34DD7EC7F5BF10435E017CF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_AD6A893DE4E0943B9359F10435E0E9A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_81C55EECC34DD7EC7F5BF10435E017CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_9F1A3F3994A742F3C060F10435E1FCF4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_AD6A893DE4E0943B9359F10435E0E9A0" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_9F1A3F3994A742F3C060F10435E1FCF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_596E431393E36DED310CF10435E16968" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_AD6A893DE4E0943B9359F10435E0E9A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_596E431393E36DED310CF10435E16968" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherDisclosures" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OtherDisclosuresDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_DD89126FF47CE79811DCF10435BCCBD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_DD89126FF47CE79811DCF10435BCCBD5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_D62EEC662D5580C20008F10435BCE508" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_DD89126FF47CE79811DCF10435BCCBD5" xlink:to="loc_srt_RangeAxis_D62EEC662D5580C20008F10435BCE508" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_28E8F9D8471D09BDD403F10435BC1D56_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_D62EEC662D5580C20008F10435BCE508" xlink:to="loc_srt_RangeMember_28E8F9D8471D09BDD403F10435BC1D56_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_28E8F9D8471D09BDD403F10435BC1D56" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_D62EEC662D5580C20008F10435BCE508" xlink:to="loc_srt_RangeMember_28E8F9D8471D09BDD403F10435BC1D56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_82FE33E25D2D933A5AE5F10435BD9962" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_28E8F9D8471D09BDD403F10435BC1D56" xlink:to="loc_srt_MaximumMember_82FE33E25D2D933A5AE5F10435BD9962" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srt_TitleOfIndividualAxis_15631607EAD92E367A25F10435BDBB10" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_DD89126FF47CE79811DCF10435BCCBD5" xlink:to="loc_srt_TitleOfIndividualAxis_15631607EAD92E367A25F10435BDBB10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_EB831462CA1E9442DF22F10435BD71CB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_15631607EAD92E367A25F10435BDBB10" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_EB831462CA1E9442DF22F10435BD71CB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_EB831462CA1E9442DF22F10435BD71CB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_15631607EAD92E367A25F10435BDBB10" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_EB831462CA1E9442DF22F10435BD71CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ExecutiveOfficerMember" xlink:label="loc_srt_ExecutiveOfficerMember_EA7D6D425439F6B5DFCAF10435BD6B35" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_EB831462CA1E9442DF22F10435BD71CB" xlink:to="loc_srt_ExecutiveOfficerMember_EA7D6D425439F6B5DFCAF10435BD6B35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_539E7D0F31EDD0700A0AF10435BE3D52" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_DD89126FF47CE79811DCF10435BCCBD5" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_539E7D0F31EDD0700A0AF10435BE3D52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_E9FAD7D232365ACB605AF10435BE1BE0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_539E7D0F31EDD0700A0AF10435BE3D52" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_E9FAD7D232365ACB605AF10435BE1BE0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_E9FAD7D232365ACB605AF10435BE1BE0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_539E7D0F31EDD0700A0AF10435BE3D52" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_E9FAD7D232365ACB605AF10435BE1BE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredBonusMember" xlink:label="loc_us-gaap_DeferredBonusMember_5BFC1C240BB1A18F0BF7F10435BE9B29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_E9FAD7D232365ACB605AF10435BE1BE0" xlink:to="loc_us-gaap_DeferredBonusMember_5BFC1C240BB1A18F0BF7F10435BE9B29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_500FACA95B6C83F30264F10435BF4962" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_500FACA95B6C83F30264F10435BF4962" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred" xlink:label="loc_trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred_73113499852379F4AF7DF10435BF9391" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred_73113499852379F4AF7DF10435BF9391" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DeferredCompensationArrangementwithIndividualInitialMinimumContractualTerm" xlink:label="loc_trow_DeferredCompensationArrangementwithIndividualInitialMinimumContractualTerm_93A36617F2EE2277031EF10435BF749D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_trow_DeferredCompensationArrangementwithIndividualInitialMinimumContractualTerm_93A36617F2EE2277031EF10435BF749D" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DeferredCompensationArrangementwithIndividualInitialMaximumContractualTerm" xlink:label="loc_trow_DeferredCompensationArrangementwithIndividualInitialMaximumContractualTerm_7E2A45F76676C69A4385F10435BF6B6D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_trow_DeferredCompensationArrangementwithIndividualInitialMaximumContractualTerm_7E2A45F76676C69A4385F10435BF6B6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount_5048263ABE316F502064F10435BF6080" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_2237A7D3714FBEE3168CF10435BEEB0E" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount_5048263ABE316F502064F10435BF6080" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/PropertyAndEquipment" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/PropertyAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8E7144D864E8CD3C3F51F10436481679" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8E7144D864E8CD3C3F51F10436481679" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AAD503EAEE9971A14D6BF10436486C53" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8E7144D864E8CD3C3F51F10436481679" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AAD503EAEE9971A14D6BF10436486C53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AAD503EAEE9971A14D6BF10436486C53" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AAD503EAEE9971A14D6BF10436486C53" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ComputerAndCommunicationsSoftwareAndEquipmentMember" xlink:label="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_10C3631236739E37D3FCF1043649E5E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_10C3631236739E37D3FCF1043649E5E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_729C6A743164F12AA2AFF10436495968" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_729C6A743164F12AA2AFF10436495968" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_0AE8C6192250C1BA3FF0F10436491115" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_0AE8C6192250C1BA3FF0F10436491115" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_E031CC37B8678F5BBC9FF1043649B1DB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_E031CC37B8678F5BBC9FF1043649B1DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_F96C6D1A94B797D8C360F104364AC803" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_us-gaap_LandMember_F96C6D1A94B797D8C360F104364AC803" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_LeasedLandMember" xlink:label="loc_trow_LeasedLandMember_E4F6422389E39FEDB405F104364A3D56" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_trow_LeasedLandMember_E4F6422389E39FEDB405F104364A3D56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SoftwareDevelopmentMember" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_BEED44B7FAB4FFC9D7E1F104364A540A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8C7A7B3B1627B50DE73EF10436497E6B" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_BEED44B7FAB4FFC9D7E1F104364A540A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_FE5C643FF06CF81E6CC6F104364AC7AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_FE5C643FF06CF81E6CC6F104364AC7AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_68A293D5E358620AE239F104364AFC69" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_68A293D5E358620AE239F104364AFC69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_1B51FAD5F2FD403491BEF104364BAFFA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_1B51FAD5F2FD403491BEF104364BAFFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAdditions" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_39ABBB404088ADDEAD3FF104364B8AF7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4E74F5BEA8F5F001A373F104364AF362" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_39ABBB404088ADDEAD3FF104364B8AF7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/PropertyAndEquipmentTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_032EF46D92C59F6E4A15F10436126BAF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D3A6EF5ED7B5DDBBC10BF1043611B1E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_032EF46D92C59F6E4A15F10436126BAF" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D3A6EF5ED7B5DDBBC10BF1043611B1E1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_81DEDCCE2B59E0CE85CDF10436119C7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D3A6EF5ED7B5DDBBC10BF1043611B1E1" xlink:to="loc_us-gaap_AwardTypeAxis_81DEDCCE2B59E0CE85CDF10436119C7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_81DEDCCE2B59E0CE85CDF10436119C7B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_81DEDCCE2B59E0CE85CDF10436119C7B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_4FBD2732767269D17196F1043612EA1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41" xlink:to="loc_us-gaap_StockCompensationPlanMember_4FBD2732767269D17196F1043612EA1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_79F8BAAAB4B92F805E75F1043612A19E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A6FF128D4F03A847DAC8F10436119A41" xlink:to="loc_us-gaap_EmployeeStockMember_79F8BAAAB4B92F805E75F1043612A19E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_312E58F3A516A0378F82F1043612352C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_032EF46D92C59F6E4A15F10436126BAF" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_312E58F3A516A0378F82F1043612352C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensationFutureStockBasedCompensationExpenseDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensationRestrictedSharesAndStockUnitsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srt_TitleOfIndividualAxis_508E7953206A2354BB21F10435FA69AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:to="loc_srt_TitleOfIndividualAxis_508E7953206A2354BB21F10435FA69AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_D693CFF7551FF8864FE3F10435FB5DA8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_508E7953206A2354BB21F10435FA69AD" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_D693CFF7551FF8864FE3F10435FB5DA8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_D693CFF7551FF8864FE3F10435FB5DA8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_508E7953206A2354BB21F10435FA69AD" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_D693CFF7551FF8864FE3F10435FB5DA8" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_NonEmployeeDirectorsMember" xlink:label="loc_trow_NonEmployeeDirectorsMember_2AAFFC9AC2564354980AF10435FB68F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_D693CFF7551FF8864FE3F10435FB5DA8" xlink:to="loc_trow_NonEmployeeDirectorsMember_2AAFFC9AC2564354980AF10435FB68F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_E3FD612342C883AABF28F10435FBDA28" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:to="loc_us-gaap_AwardTypeAxis_E3FD612342C883AABF28F10435FBDA28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_693F53B3A3554CFA9EFFF10435FB6935_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_E3FD612342C883AABF28F10435FBDA28" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_693F53B3A3554CFA9EFFF10435FB6935_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_693F53B3A3554CFA9EFFF10435FB6935" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_E3FD612342C883AABF28F10435FBDA28" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_693F53B3A3554CFA9EFFF10435FB6935" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_RestrictedStockAndRestrictedStockUnitsMember" xlink:label="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_45E81C1F3A09754CC14AF10435FCF82F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_693F53B3A3554CFA9EFFF10435FB6935" xlink:to="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_45E81C1F3A09754CC14AF10435FCF82F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_0E9F911447E703973496F10435FC307C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_45E81C1F3A09754CC14AF10435FCF82F" xlink:to="loc_us-gaap_RestrictedStockMember_0E9F911447E703973496F10435FC307C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_9607A5750560A0744A5EF10435FC9E59" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_45E81C1F3A09754CC14AF10435FCF82F" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_9607A5750560A0744A5EF10435FC9E59" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaap_VestingAxis_5CFE2B14DE66F763312DF10435FC8EBF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:to="loc_us-gaap_VestingAxis_5CFE2B14DE66F763312DF10435FC8EBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_5CFE2B14DE66F763312DF10435FC8EBF" xlink:to="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_5CFE2B14DE66F763312DF10435FC8EBF" xlink:to="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_67D33DBE8207F3962200F10435FD3018" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_67D33DBE8207F3962200F10435FD3018" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_B7E4A6BD8974586DF6E4F10435FDA5B0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_F4141D7D966617AEA6F0F10435FCE8B8" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_B7E4A6BD8974586DF6E4F10435FDA5B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_FC7DF943DBC59B8ECB9FF10435FD07BA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_CEF9CC7E2A824B644752F10435FA4243" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_FC7DF943DBC59B8ECB9FF10435FD07BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_18E3CA7709D0360BD3F9F10435FD8437_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_FC7DF943DBC59B8ECB9FF10435FD07BA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_18E3CA7709D0360BD3F9F10435FD8437_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_18E3CA7709D0360BD3F9F10435FD8437" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_FC7DF943DBC59B8ECB9FF10435FD07BA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_18E3CA7709D0360BD3F9F10435FD8437" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_CompensationandRelatedCostsMember" xlink:label="loc_trow_CompensationandRelatedCostsMember_3BC574DA09C941837BD4F10435FDF43C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_18E3CA7709D0360BD3F9F10435FD8437" xlink:to="loc_trow_CompensationandRelatedCostsMember_3BC574DA09C941837BD4F10435FDF43C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_37257AE726AF0C5180F5F10435FE4986" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_37257AE726AF0C5180F5F10435FE4986" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_44B8D703EA1A6D04C6F9F10435FE54DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_44B8D703EA1A6D04C6F9F10435FE54DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_E497898F06834A093FB7F10435FFD485" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_E497898F06834A093FB7F10435FFD485" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_515F9F013C3FE626503BF10435FFAE2A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_5DFCA75E3AAA6F3DB1C9F10435FE260D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_515F9F013C3FE626503BF10435FFAE2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_E42B82F8F2F3878D0648F10435FFAE26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_E42B82F8F2F3878D0648F10435FFAE26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_78548122429D3E174A55F10435FFC8FC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_78548122429D3E174A55F10435FFC8FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0ACC41932B582A6F99D4F1043600AD79" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0ACC41932B582A6F99D4F1043600AD79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3CBB2785D8D731E78D1CF10436009712" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B8E6C972E63267542FBCF10435FF5F2B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3CBB2785D8D731E78D1CF10436009712" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_A9B5FCB176A00F521D1CF1043600AF0F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_A9B5FCB176A00F521D1CF1043600AF0F" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber" xlink:label="loc_trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber_ADA031B810AD03ADEA22F1043600E557" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber_ADA031B810AD03ADEA22F1043600E557" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_F755F303946FAF3AA039F1043600656D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_F755F303946FAF3AA039F1043600656D" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_VestedRestrictedStockUnits" xlink:label="loc_trow_VestedRestrictedStockUnits_0E6C875A0AD1614879D9F104360193B8" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B5EDF752BA4BF3CBC099F10435FEDBEE" xlink:to="loc_trow_VestedRestrictedStockUnits_0E6C875A0AD1614879D9F104360193B8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensationStockOptionsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_82670B5EEEC927DFE930F10436079661" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_82670B5EEEC927DFE930F10436079661" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_06431EC41D80E00012F1F104360703E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_82670B5EEEC927DFE930F10436079661" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_06431EC41D80E00012F1F104360703E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_C224519654B576A04B06F1043608B233_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_06431EC41D80E00012F1F104360703E8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_C224519654B576A04B06F1043608B233_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_C224519654B576A04B06F1043608B233" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_06431EC41D80E00012F1F104360703E8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_C224519654B576A04B06F1043608B233" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_CompensationandRelatedCostsMember" xlink:label="loc_trow_CompensationandRelatedCostsMember_E5A3548B10D809460A56F10436089EAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_C224519654B576A04B06F1043608B233" xlink:to="loc_trow_CompensationandRelatedCostsMember_E5A3548B10D809460A56F10436089EAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_EA2DF2378CD010A199D5F1043608CEE7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_82670B5EEEC927DFE930F10436079661" xlink:to="loc_us-gaap_AwardTypeAxis_EA2DF2378CD010A199D5F1043608CEE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A263EA944BA4A271E8AEF1043608EAFD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_EA2DF2378CD010A199D5F1043608CEE7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A263EA944BA4A271E8AEF1043608EAFD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A263EA944BA4A271E8AEF1043608EAFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_EA2DF2378CD010A199D5F1043608CEE7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A263EA944BA4A271E8AEF1043608EAFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_F6BA19C2615BABEA320DF104360930F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A263EA944BA4A271E8AEF1043608EAFD" xlink:to="loc_us-gaap_EmployeeStockOptionMember_F6BA19C2615BABEA320DF104360930F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_7EBB425E2A2EA95551BAF10436097261" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_7EBB425E2A2EA95551BAF10436097261" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0AB91A1EAABD2FEB37AEF10436090EC7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0AB91A1EAABD2FEB37AEF10436090EC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_3AA8CB0FE1A4E95F1F50F104360A7BC7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_3AA8CB0FE1A4E95F1F50F104360A7BC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_7D88147896F62A3DDB64F104360A1F1A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5D17425AD4762E0A59CCF1043609B226" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_7D88147896F62A3DDB64F104360A1F1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_D0E18E3B29C7A4823193F104360ABF78" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_D0E18E3B29C7A4823193F104360ABF78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_96FFF7F46D725EAAB7DBF104360A38BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_96FFF7F46D725EAAB7DBF104360A38BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_E4E83FDBDA2F3464FDFAF104360B40FC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_E4E83FDBDA2F3464FDFAF104360B40FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_BDF13A6C1BA1A5754338F104360B084B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_BDF13A6C1BA1A5754338F104360B084B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_476ECC10366FABD3BC76F104360B8B10" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_5E09E434D4C3EC7279E1F104360A025D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_476ECC10366FABD3BC76F104360B8B10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_0FC6338400A7AE0A572FF104360B6984" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_0FC6338400A7AE0A572FF104360B6984" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_9C3312CD0198D92BDA37F104360CDC8E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_9C3312CD0198D92BDA37F104360CDC8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0CEE72C96D2E81A523BAF104360CA70B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0CEE72C96D2E81A523BAF104360CA70B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_5E8EC69873050DCDF37DF104360C9177" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_5E8EC69873050DCDF37DF104360C9177" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_870F169F8933037815D1F104360CEB86" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_870F169F8933037815D1F104360CEB86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_7749C314421904F68B34F104360CE9F2" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_7749C314421904F68B34F104360CE9F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A9A59B9F0ED17ACFF45CF104360C244E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3ADEF9387EC59645AB16F1043609E29C" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A9A59B9F0ED17ACFF45CF104360C244E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockBasedCompensationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockholdersEquity" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/StockholdersEquityDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnauditedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemLineItems" xlink:label="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemTable" xlink:label="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemAxis" xlink:label="loc_us-gaap_UnusualOrInfrequentItemAxis_C2AEC9854439244FDFEAF104359B4EB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:to="loc_us-gaap_UnusualOrInfrequentItemAxis_C2AEC9854439244FDFEAF104359B4EB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemDomain" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_7BBA40D38A6E18E06676F104359B1C96_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_C2AEC9854439244FDFEAF104359B4EB8" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_7BBA40D38A6E18E06676F104359B1C96_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemDomain" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_7BBA40D38A6E18E06676F104359B1C96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_C2AEC9854439244FDFEAF104359B4EB8" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_7BBA40D38A6E18E06676F104359B1C96" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DellappraisalrightsmatterMember" xlink:label="loc_trow_DellappraisalrightsmatterMember_AECC80FF192F780CCEE5F104359B3529" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemDomain_7BBA40D38A6E18E06676F104359B1C96" xlink:to="loc_trow_DellappraisalrightsmatterMember_AECC80FF192F780CCEE5F104359B3529" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_038ECE5F10D7766754D8F104359CB7AE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_038ECE5F10D7766754D8F104359CB7AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_959DA58AD736D4B10F55F104359CAB3A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_038ECE5F10D7766754D8F104359CB7AE" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_959DA58AD736D4B10F55F104359CAB3A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_959DA58AD736D4B10F55F104359CAB3A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_038ECE5F10D7766754D8F104359CB7AE" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_959DA58AD736D4B10F55F104359CAB3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_335C40206DC44433533AF104359CCB3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_959DA58AD736D4B10F55F104359CAB3A" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_335C40206DC44433533AF104359CCB3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_5B4C858A48C466419883F104359D5F47" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_5B4C858A48C466419883F104359D5F47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_38DC5D2D04AE6EE59F4AF104359D91D9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_5B4C858A48C466419883F104359D5F47" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_38DC5D2D04AE6EE59F4AF104359D91D9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_38DC5D2D04AE6EE59F4AF104359D91D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_5B4C858A48C466419883F104359D5F47" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_38DC5D2D04AE6EE59F4AF104359D91D9" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_ComptrollerOfMarylandMember" xlink:label="loc_trow_ComptrollerOfMarylandMember_315B77D256F78CBB72A9F104359D3860" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_38DC5D2D04AE6EE59F4AF104359D91D9" xlink:to="loc_trow_ComptrollerOfMarylandMember_315B77D256F78CBB72A9F104359D3860" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_AC47AF821B666C3C08D2F104359DC17C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_EC8C829A49D77F926FA9F104359A071A" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_AC47AF821B666C3C08D2F104359DC17C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_DF3F28FF3B2A03C769DCF104359DD9B8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_AC47AF821B666C3C08D2F104359DC17C" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_DF3F28FF3B2A03C769DCF104359DD9B8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_DF3F28FF3B2A03C769DCF104359DD9B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_AC47AF821B666C3C08D2F104359DC17C" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_DF3F28FF3B2A03C769DCF104359DD9B8" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_DaiwaSBInvestmentsLtdMember" xlink:label="loc_trow_DaiwaSBInvestmentsLtdMember_69F93181E1E5385E011EF104359E07AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_DF3F28FF3B2A03C769DCF104359DD9B8" xlink:to="loc_trow_DaiwaSBInvestmentsLtdMember_69F93181E1E5385E011EF104359E07AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9EA83CD8E0ADF99F13B0F104359E059C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9EA83CD8E0ADF99F13B0F104359E059C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_B6F570B8F54B527215B9F104359E94E4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_ProfitLoss_B6F570B8F54B527215B9F104359E94E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_B1733DE8CE065046A226F104359F125A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_NetIncomeLoss_B1733DE8CE065046A226F104359F125A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_B63F665C73BE5B6F0E42F104359F2EAA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_EarningsPerShareBasic_B63F665C73BE5B6F0E42F104359F2EAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_ABE858855C8072A43BA1F104359F2860" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_EarningsPerShareDiluted_ABE858855C8072A43BA1F104359F2860" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds" xlink:label="loc_us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds_73201A0751979BF8EE69F104359F5214" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds_73201A0751979BF8EE69F104359F5214" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit_6CEC3B06D0EB9A20B335F104359F48A9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit_6CEC3B06D0EB9A20B335F104359F48A9" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_TaxCutsAndJobsActOf2017EffectOnEarningsPerShareDiluted" xlink:label="loc_trow_TaxCutsAndJobsActOf2017EffectOnEarningsPerShareDiluted_1F29981BF0B464835381F104359F2119" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_trow_TaxCutsAndJobsActOf2017EffectOnEarningsPerShareDiluted_1F29981BF0B464835381F104359F2119" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_440EC3698583F88E26D0F10435A042F8" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_440EC3698583F88E26D0F10435A042F8" xlink:type="arc" />
    <link:loc xlink:href="trow-20191231.xsd#trow_InvestmentsOwnershipInterestPercentage" xlink:label="loc_trow_InvestmentsOwnershipInterestPercentage_237EDED8C74D6724EF10F10435A0F9FC" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_8AE982887E13F66313D0F104359E97B2" xlink:to="loc_trow_InvestmentsOwnershipInterestPercentage_237EDED8C74D6724EF10F10435A0F9FC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/SupplementaryQuarterlyFinancialDataUnauditedTables" xlink:type="extended" />
</link:linkbase>
