<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c91f4-5e5e-7698-9228-3725e597aeec,g:8fb2e77d-08aa-41d2-bcce-fdabc19e9f0b-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://ropertech.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited" xlink:type="simple" xlink:href="rop-20260331.xsd#CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c91f4-5fd9-7ccd-a57b-54ee936f2fbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c91f4-5fd9-7fea-ba68-f421f4f49293" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c91f4-5fd9-7ccd-a57b-54ee936f2fbf" xlink:to="loc_us-gaap_StatementTable_019c91f4-5fd9-7fea-ba68-f421f4f49293" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c91f4-5fd9-7fd6-ab73-8164281d8dfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c91f4-5fd9-7fea-ba68-f421f4f49293" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c91f4-5fd9-7fd6-ab73-8164281d8dfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7fd6-ab73-8164281d8dfe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c91f4-5fd9-7fd6-ab73-8164281d8dfe" xlink:to="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7fd6-ab73-8164281d8dfe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c91f4-5fd9-7fd6-ab73-8164281d8dfe" xlink:to="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019c91f4-5fd9-7c36-9514-3d8ea8eaf6e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:to="loc_us-gaap_CommonStockMember_019c91f4-5fd9-7c36-9514-3d8ea8eaf6e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019c91f4-5fd9-792c-96d0-643cac225e06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019c91f4-5fd9-792c-96d0-643cac225e06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019c91f4-5fd9-70a6-9f0e-0ce0dcc33d14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:to="loc_us-gaap_RetainedEarningsMember_019c91f4-5fd9-70a6-9f0e-0ce0dcc33d14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c91f4-5fd9-7d1b-9534-e811d090a683" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c91f4-5fd9-7d1b-9534-e811d090a683" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019c91f4-5fd9-719f-95ef-ada08720b21e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c91f4-5fd9-7b97-89d7-3f7fe09b58ff" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019c91f4-5fd9-719f-95ef-ada08720b21e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c91f4-5fd9-7ccd-a57b-54ee936f2fbf" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c91f4-5fd9-7f86-8d18-16c9a67d0078" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockholdersEquity_019c91f4-5fd9-7f86-8d18-16c9a67d0078" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019c91f4-5fd9-7d05-8017-0279e5652a56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_NetIncomeLoss_019c91f4-5fd9-7d05-8017-0279e5652a56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019c91f4-5fd9-7b9d-a22d-5a3d34d7dfa9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019c91f4-5fd9-7b9d-a22d-5a3d34d7dfa9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_019c91f4-5fd9-72c9-bf4b-514366908546" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_019c91f4-5fd9-72c9-bf4b-514366908546" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019d24b3-0f71-76b3-b3a6-347ed9eee2df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019d24b3-0f71-76b3-b3a6-347ed9eee2df" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019c91f4-5fd9-751d-9cc3-799f137b5ad4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019c91f4-5fd9-751d-9cc3-799f137b5ad4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c91f4-5fd9-7161-aea0-d5cc5f5fe756" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c91f4-5fd9-7161-aea0-d5cc5f5fe756" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019c91f4-5fd9-79ff-980e-7c103e11c9b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019c91f4-5fd9-79ff-980e-7c103e11c9b1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_019c91f4-5fd9-7e62-8185-514128847a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c91f4-5fd9-7244-a89c-e8b6db677012" xlink:to="loc_us-gaap_DividendsCommonStockCash_019c91f4-5fd9-7e62-8185-514128847a4a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c91f4-5fd9-7a68-a670-d27635d806e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c91f4-5fd9-739b-b900-3914aee85247" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c91f4-5fd9-739b-b900-3914aee85247" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c91f4-5fd9-739b-b900-3914aee85247" xlink:to="loc_us-gaap_AwardTypeAxis_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c91f4-5fd9-7ef5-a0d1-3ce51b527bf1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c91f4-5fd9-7b7a-9fbe-8323329f5d12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c91f4-5fd9-7b7a-9fbe-8323329f5d12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019c91f4-5fd9-7f64-b093-00f137bb8942" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:to="loc_us-gaap_RestrictedStockMember_019c91f4-5fd9-7f64-b093-00f137bb8942" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019d24de-eb1b-74ce-ae3b-2e2ab682d4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:to="loc_us-gaap_PerformanceSharesMember_019d24de-eb1b-74ce-ae3b-2e2ab682d4bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019c91f4-5fd9-7f33-9cca-24a844cd8aff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c91f4-5fd9-7dd7-bd89-8037e83c82f0" xlink:to="loc_us-gaap_EmployeeStockMember_019c91f4-5fd9-7f33-9cca-24a844cd8aff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c91f4-5fd9-7154-a972-c5d808a283a4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c91f4-5fd9-739b-b900-3914aee85247" xlink:to="loc_srt_RangeAxis_019c91f4-5fd9-7154-a972-c5d808a283a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c91f4-5fd9-7154-a972-c5d808a283a4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c91f4-5fd9-7154-a972-c5d808a283a4" xlink:to="loc_srt_RangeMember_019c91f4-5fd9-7154-a972-c5d808a283a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c91f4-5fd9-71e8-84f9-4043ad4f1937" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c91f4-5fd9-7154-a972-c5d808a283a4" xlink:to="loc_srt_RangeMember_019c91f4-5fd9-71e8-84f9-4043ad4f1937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c91f4-5fd9-7100-b707-360bfe6d48d7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c91f4-5fd9-71e8-84f9-4043ad4f1937" xlink:to="loc_srt_MaximumMember_019c91f4-5fd9-7100-b707-360bfe6d48d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_019c91f4-5fd9-7877-999c-ffe2823ab8cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_019c91f4-5fd9-7877-999c-ffe2823ab8cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-7771-afcd-d786627ad403" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-7771-afcd-d786627ad403" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_019c91f4-5fd9-73e4-b69b-7f1176d06653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_019c91f4-5fd9-73e4-b69b-7f1176d06653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c91f4-5fd9-7c87-8c39-c3b0460a795f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c91f4-5fd9-7c87-8c39-c3b0460a795f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-79c4-b17d-ad8bf201d073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-79c4-b17d-ad8bf201d073" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c91f4-5fd9-76e0-94e6-5facaeaf1d73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c91f4-5fd9-76e0-94e6-5facaeaf1d73" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c91f4-5fd9-744e-8857-6b25384fb6d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c91f4-5fd9-744e-8857-6b25384fb6d1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019c91f4-5fd9-7f88-a8a9-04bd63d0989d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019c91f4-5fd9-7f88-a8a9-04bd63d0989d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-7fcd-9778-6efe9612e789" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019c91f4-5fd9-7fcd-9778-6efe9612e789" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue_019c91f4-5fd9-76f1-a392-49096c118c9b" xlink:href="rop-20260331.xsd#rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue_019c91f4-5fd9-76f1-a392-49096c118c9b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_019c91f4-5fd9-7e1e-8655-5e007d61fc97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_019c91f4-5fd9-7e1e-8655-5e007d61fc97" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_019c91f4-5fd9-7697-8bd4-efd80bbacec4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_019c91f4-5fd9-7697-8bd4-efd80bbacec4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019c91f4-5fd9-7ecc-8133-aa9df51c31ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019c91f4-5fd9-7ecc-8133-aa9df51c31ca" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019c91f4-5fd9-75bf-8747-d388d6f6a316" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c91f4-5fd9-751a-98ac-96e7b4b80869" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019c91f4-5fd9-75bf-8747-d388d6f6a316" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#StockholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/StockholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramTable_019d24e7-d173-7731-87f3-33625af57128" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_srt_ShareRepurchaseProgramTable_019d24e7-d173-7731-87f3-33625af57128" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019d24e7-d173-7f31-8d3a-117681cbcd4a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019d24e7-d173-7731-87f3-33625af57128" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019d24e7-d173-7f31-8d3a-117681cbcd4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019d24e7-d173-7f31-8d3a-117681cbcd4a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019d24e7-d173-7f31-8d3a-117681cbcd4a" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019d24e7-d173-7f31-8d3a-117681cbcd4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019d24e7-d173-7baf-b39d-9fc1a1c534a9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019d24e7-d173-7f31-8d3a-117681cbcd4a" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019d24e7-d173-7baf-b39d-9fc1a1c534a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ShareRepurchaseProgramMember_019d24e7-d173-798d-afeb-a42c15592264" xlink:href="rop-20260331.xsd#rop_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019d24e7-d173-7baf-b39d-9fc1a1c534a9" xlink:to="loc_rop_ShareRepurchaseProgramMember_019d24e7-d173-798d-afeb-a42c15592264" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019d6812-b3e3-75cf-9568-970935b1da01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019d24e7-d173-7731-87f3-33625af57128" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019d6812-b3e3-75cf-9568-970935b1da01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019d6812-b3e3-75cf-9568-970935b1da01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019d6812-b3e3-75cf-9568-970935b1da01" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019d6812-b3e3-75cf-9568-970935b1da01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019d6812-b3e4-7820-ab69-627682f154ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019d6812-b3e3-75cf-9568-970935b1da01" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019d6812-b3e4-7820-ab69-627682f154ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019d6812-daeb-7f5c-b227-6d8f5dac4e15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019d6812-b3e4-7820-ab69-627682f154ee" xlink:to="loc_us-gaap_SubsequentEventMember_019d6812-daeb-7f5c-b227-6d8f5dac4e15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019d24e7-d173-7756-9984-495ad3eead1b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019d24e7-d173-7756-9984-495ad3eead1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019d24e7-d173-7ef2-a833-945dcac7e90e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019d24e7-d173-7ef2-a833-945dcac7e90e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019d24e7-d173-7f0d-b52e-dacae2d4ef9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019d24e7-d173-7f0d-b52e-dacae2d4ef9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019d24e7-d173-7476-8149-37ca0d3b6cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019d24e7-d173-7476-8149-37ca0d3b6cf4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019d24e7-d173-734e-be82-be29ac7e5dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019d24e7-d173-7a22-84e4-49437fb4fcbd" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019d24e7-d173-734e-be82-be29ac7e5dfa" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_019c91f4-5fd9-73e0-bf73-b46d06c20e18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_019c91f4-5fd9-7481-baab-257b1620a289" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_019c91f4-5fd9-73e0-bf73-b46d06c20e18" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_019c91f4-5fd9-7481-baab-257b1620a289" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-704b-8640-3d5bc9804801" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019c91f4-5fd9-7481-baab-257b1620a289" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-704b-8640-3d5bc9804801" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-5fd9-704b-8640-3d5bc9804801_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-704b-8640-3d5bc9804801" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-5fd9-704b-8640-3d5bc9804801_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-5fd9-776c-986a-970613e555c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-704b-8640-3d5bc9804801" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-5fd9-776c-986a-970613e555c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-5fd9-755c-88be-4dc6a3eade89" xlink:href="rop-20260331.xsd#rop_ApplicationSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-776c-986a-970613e555c1" xlink:to="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-5fd9-755c-88be-4dc6a3eade89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NetworkSoftwareSegmentMember_019c91f4-5fd9-710a-90c7-8f6e405711a3" xlink:href="rop-20260331.xsd#rop_NetworkSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-776c-986a-970613e555c1" xlink:to="loc_rop_NetworkSoftwareSegmentMember_019c91f4-5fd9-710a-90c7-8f6e405711a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-5fd9-7f6e-a648-d4dfbf24ce2e" xlink:href="rop-20260331.xsd#rop_TechnologyEnabledProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-776c-986a-970613e555c1" xlink:to="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-5fd9-7f6e-a648-d4dfbf24ce2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019c91f4-5fd9-73e0-bf73-b46d06c20e18" xlink:to="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c91f4-5fd9-7a5c-821f-fd239323c40a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:to="loc_us-gaap_Goodwill_019c91f4-5fd9-7a5c-821f-fd239323c40a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_019c91f4-5fd9-7bd7-88ee-5a75771f7770" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_019c91f4-5fd9-7bd7-88ee-5a75771f7770" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillOtherIncreaseDecrease_019c91f4-5fd9-74db-a1c1-4fe1932c3884" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillOtherIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:to="loc_us-gaap_GoodwillOtherIncreaseDecrease_019c91f4-5fd9-74db-a1c1-4fe1932c3884" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_019c91f4-5fd9-7a65-a727-67714a2ff0c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c91f4-5fd9-7632-9558-096dd65e7bba" xlink:to="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_019c91f4-5fd9-7a65-a727-67714a2ff0c5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c91f4-5fd9-75b2-8e07-d1c9645649a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7ced-aa21-81f3f41f0269" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7ced-aa21-81f3f41f0269" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7ced-aa21-81f3f41f0269" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7c67-9255-119fea1a3f29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-7bed-a6ac-be9ec2b010cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7c67-9255-119fea1a3f29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019c91f4-5fd9-7afc-9f6f-d7d4eac8beb0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7c67-9255-119fea1a3f29" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019c91f4-5fd9-7afc-9f6f-d7d4eac8beb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnpatentedTechnologyMember_019c91f4-5fd9-7030-9ca3-9b94da9c8db3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnpatentedTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7c67-9255-119fea1a3f29" xlink:to="loc_us-gaap_UnpatentedTechnologyMember_019c91f4-5fd9-7030-9ca3-9b94da9c8db3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_019c91f4-5fd9-70c2-b754-fd3dc885536d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7c67-9255-119fea1a3f29" xlink:to="loc_us-gaap_PatentsMember_019c91f4-5fd9-70c2-b754-fd3dc885536d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-75d4-904c-0406bd15de88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7ced-aa21-81f3f41f0269" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-75d4-904c-0406bd15de88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-75d4-904c-0406bd15de88_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-75d4-904c-0406bd15de88" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-75d4-904c-0406bd15de88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-75da-ae93-4035091252fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-75d4-904c-0406bd15de88" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-75da-ae93-4035091252fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019c91f4-5fd9-78fa-8471-c86b99f85a73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-75da-ae93-4035091252fd" xlink:to="loc_us-gaap_TradeNamesMember_019c91f4-5fd9-78fa-8471-c86b99f85a73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019c91f4-5fd9-7a67-80a1-d68cf4b184a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019c91f4-5fd9-7a67-80a1-d68cf4b184a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019c91f4-5fd9-738a-83d6-021d111a7361" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019c91f4-5fd9-738a-83d6-021d111a7361" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c91f4-5fd9-7f13-8bac-8a9d5d57b331" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c91f4-5fd9-7f13-8bac-8a9d5d57b331" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019c91f4-5fd9-777b-b84f-c3bfa9c2f6c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019c91f4-5fd9-777b-b84f-c3bfa9c2f6c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019c91f4-5fd9-7948-b532-e979f840c06f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019c91f4-5fd9-7948-b532-e979f840c06f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019c91f4-5fd9-775a-9d41-8f28adbc18b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-74fe-baf9-e73353b3249c" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019c91f4-5fd9-775a-9d41-8f28adbc18b5" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#GoodwillandOtherIntangibleAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-7aa1-a0e2-0286e6a6231b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7646-b740-fec584167ef8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-7aa1-a0e2-0286e6a6231b" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7646-b740-fec584167ef8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-74c0-84f0-0118bad3db9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c91f4-5fd9-7646-b740-fec584167ef8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-74c0-84f0-0118bad3db9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-74c0-84f0-0118bad3db9f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-74c0-84f0-0118bad3db9f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-74c0-84f0-0118bad3db9f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7061-be43-46f40c40642f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c91f4-5fd9-74c0-84f0-0118bad3db9f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7061-be43-46f40c40642f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_019c91f4-5fd9-7b20-bba7-c35a0efd148b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c91f4-5fd9-7061-be43-46f40c40642f" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_019c91f4-5fd9-7b20-bba7-c35a0efd148b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019c91f4-5fd9-7e9a-9012-95f613970932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c91f4-5fd9-7aa1-a0e2-0286e6a6231b" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019c91f4-5fd9-7e9a-9012-95f613970932" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/LongTermDebtDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#LongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/LongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019d5380-72e7-735e-ad08-32d92c96212d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_us-gaap_CreditFacilityAxis_019d5380-72e7-735e-ad08-32d92c96212d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-735e-ad08-32d92c96212d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019d5380-72e7-735e-ad08-32d92c96212d" xlink:to="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-735e-ad08-32d92c96212d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-71d9-98ad-4ffa207415b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019d5380-72e7-735e-ad08-32d92c96212d" xlink:to="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-71d9-98ad-4ffa207415b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019d5380-72e7-7a8b-836f-ef8476137010" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-71d9-98ad-4ffa207415b5" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019d5380-72e7-7a8b-836f-ef8476137010" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019d5380-72e7-7633-83f9-f442720863c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019d5380-72e7-71d9-98ad-4ffa207415b5" xlink:to="loc_us-gaap_LetterOfCreditMember_019d5380-72e7-7633-83f9-f442720863c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_019d5380-72e7-7c89-b4bb-2700dfef73a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_019d5380-72e7-7f1c-ad76-8dc7cca2c7f3" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_019d5380-72e7-7c89-b4bb-2700dfef73a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_exch_JPCB_019d5380-72e7-73ee-8885-b710b4c4c2fa" xlink:href="https://xbrl.sec.gov/exch/2025/exch-2025.xsd#exch_JPCB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_019d5380-72e7-7c89-b4bb-2700dfef73a9" xlink:to="loc_exch_JPCB_019d5380-72e7-73ee-8885-b710b4c4c2fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019d5380-72e7-7a2d-809e-3e4b430f7845" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_srt_RangeAxis_019d5380-72e7-7a2d-809e-3e4b430f7845" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d5380-72e7-7a2d-809e-3e4b430f7845_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019d5380-72e7-7a2d-809e-3e4b430f7845" xlink:to="loc_srt_RangeMember_019d5380-72e7-7a2d-809e-3e4b430f7845_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d5380-72e7-795e-b0b3-f9fee85406f5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019d5380-72e7-7a2d-809e-3e4b430f7845" xlink:to="loc_srt_RangeMember_019d5380-72e7-795e-b0b3-f9fee85406f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019d5380-72e7-7cd7-ae82-ef5a1ec0aa46" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019d5380-72e7-795e-b0b3-f9fee85406f5" xlink:to="loc_srt_MinimumMember_019d5380-72e7-7cd7-ae82-ef5a1ec0aa46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019d5380-72e7-7007-a969-a34a4ed0172c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019d5380-72e7-795e-b0b3-f9fee85406f5" xlink:to="loc_srt_MaximumMember_019d5380-72e7-7007-a969-a34a4ed0172c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019d5380-72e7-74dd-aba8-9e714bf3e2ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_us-gaap_VariableRateAxis_019d5380-72e7-74dd-aba8-9e714bf3e2ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019d5380-72e7-74dd-aba8-9e714bf3e2ed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019d5380-72e7-74dd-aba8-9e714bf3e2ed" xlink:to="loc_us-gaap_VariableRateDomain_019d5380-72e7-74dd-aba8-9e714bf3e2ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019d5380-72e7-70e2-b15a-f758b18cfedc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019d5380-72e7-74dd-aba8-9e714bf3e2ed" xlink:to="loc_us-gaap_VariableRateDomain_019d5380-72e7-70e2-b15a-f758b18cfedc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_CurrentVariableRateInEffectMember_019d5380-72e7-7eab-aa98-cce69fc9fd9c" xlink:href="rop-20260331.xsd#rop_CurrentVariableRateInEffectMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019d5380-72e7-70e2-b15a-f758b18cfedc" xlink:to="loc_rop_CurrentVariableRateInEffectMember_019d5380-72e7-7eab-aa98-cce69fc9fd9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019dd18d-281a-7ab7-95ee-e1811af3d03a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019d5380-72e7-70e2-b15a-f758b18cfedc" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019dd18d-281a-7ab7-95ee-e1811af3d03a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019dd18e-1eec-7d49-90f5-45b615965ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019d5380-72e7-70e2-b15a-f758b18cfedc" xlink:to="loc_us-gaap_BaseRateMember_019dd18e-1eec-7d49-90f5-45b615965ed9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_InterestRateScenarioAxis_019d5380-72e7-77c1-a12b-86328982056a" xlink:href="rop-20260331.xsd#rop_InterestRateScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_rop_InterestRateScenarioAxis_019d5380-72e7-77c1-a12b-86328982056a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_InterestRateScenarioDomain_019d5380-72e7-77c1-a12b-86328982056a_default" xlink:href="rop-20260331.xsd#rop_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_rop_InterestRateScenarioAxis_019d5380-72e7-77c1-a12b-86328982056a" xlink:to="loc_rop_InterestRateScenarioDomain_019d5380-72e7-77c1-a12b-86328982056a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_InterestRateScenarioDomain_019d5380-72e7-7b36-bc6d-b8a07edc42d1" xlink:href="rop-20260331.xsd#rop_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_rop_InterestRateScenarioAxis_019d5380-72e7-77c1-a12b-86328982056a" xlink:to="loc_rop_InterestRateScenarioDomain_019d5380-72e7-7b36-bc6d-b8a07edc42d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_InterestRateScenarioOneMember_019d5380-72e7-7523-a241-18118dc9cc92" xlink:href="rop-20260331.xsd#rop_InterestRateScenarioOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_InterestRateScenarioDomain_019d5380-72e7-7b36-bc6d-b8a07edc42d1" xlink:to="loc_rop_InterestRateScenarioOneMember_019d5380-72e7-7523-a241-18118dc9cc92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_InterestRateScenarioTwoMember_019d5380-acb0-7664-8c91-ec36d6ae83cf" xlink:href="rop-20260331.xsd#rop_InterestRateScenarioTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_InterestRateScenarioDomain_019d5380-72e7-7b36-bc6d-b8a07edc42d1" xlink:to="loc_rop_InterestRateScenarioTwoMember_019d5380-acb0-7664-8c91-ec36d6ae83cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019dd18a-51f7-76eb-a6a8-3958fd877a6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019dd18a-51f7-76eb-a6a8-3958fd877a6c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019dd18a-51f7-76eb-a6a8-3958fd877a6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019dd18a-51f7-76eb-a6a8-3958fd877a6c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019dd18a-51f7-76eb-a6a8-3958fd877a6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019dd18a-51f7-701a-9627-0a6af6cfd7ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019dd18a-51f7-76eb-a6a8-3958fd877a6c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019dd18a-51f7-701a-9627-0a6af6cfd7ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019dd18a-51f7-7fac-b9bc-46ebbc71a606" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019dd18a-51f7-701a-9627-0a6af6cfd7ce" xlink:to="loc_us-gaap_LineOfCreditMember_019dd18a-51f7-7fac-b9bc-46ebbc71a606" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019dd18b-1039-764a-8ccf-a9f0004799fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c91f4-5fd9-7f4c-a7bb-13605c459dd6" xlink:to="loc_us-gaap_DebtInstrumentAxis_019dd18b-1039-764a-8ccf-a9f0004799fa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dd18b-1039-764a-8ccf-a9f0004799fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dd18b-1039-764a-8ccf-a9f0004799fa" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dd18b-1039-764a-8ccf-a9f0004799fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dd18b-1039-7293-9470-d2db376e755c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dd18b-1039-764a-8ccf-a9f0004799fa" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dd18b-1039-7293-9470-d2db376e755c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_CreditAgreementMember_019dd18b-9162-7db0-a727-34d71f17b2c8" xlink:href="rop-20260331.xsd#rop_CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dd18b-1039-7293-9470-d2db376e755c" xlink:to="loc_rop_CreditAgreementMember_019dd18b-9162-7db0-a727-34d71f17b2c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019d5380-72e7-7b0d-bd95-7ca74883cac0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_DebtInstrumentTerm_019d5380-72e7-7b0d-bd95-7ca74883cac0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019d5380-72e7-7679-9132-eb96e5433abd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019d5380-72e7-7679-9132-eb96e5433abd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019d5380-72e7-723a-806c-0ee675b04bde" xlink:href="rop-20260331.xsd#rop_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_rop_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019d5380-72e7-723a-806c-0ee675b04bde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019d5380-72e7-7839-861c-7d9032032f93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019d5380-72e7-7839-861c-7d9032032f93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_DebtInstrumentBasisSpreadOnVariableRateBasedOnCreditRating_019d5380-72e7-76d2-befc-b913169773a1" xlink:href="rop-20260331.xsd#rop_DebtInstrumentBasisSpreadOnVariableRateBasedOnCreditRating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_rop_DebtInstrumentBasisSpreadOnVariableRateBasedOnCreditRating_019d5380-72e7-76d2-befc-b913169773a1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019d5380-acb0-7504-9d63-14db3c0469f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019d5380-acb0-7504-9d63-14db3c0469f5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_LineOfCreditFacilityLettersOfCreditFeePercentage_019d53be-bf95-7253-b678-43cb90947bbc" xlink:href="rop-20260331.xsd#rop_LineOfCreditFacilityLettersOfCreditFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_rop_LineOfCreditFacilityLettersOfCreditFeePercentage_019d53be-bf95-7253-b678-43cb90947bbc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019d53be-bf95-74c8-ac32-cc6234d9e932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019d53be-bf95-74c8-ac32-cc6234d9e932" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_LineOfCreditFacilityCovenantDebtToCapitalRatioMaximum_019d5380-acb0-7398-acd8-b8eacdbf305c" xlink:href="rop-20260331.xsd#rop_LineOfCreditFacilityCovenantDebtToCapitalRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_rop_LineOfCreditFacilityCovenantDebtToCapitalRatioMaximum_019d5380-acb0-7398-acd8-b8eacdbf305c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019de4d1-0814-7c98-b0db-a8d42cc983dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c91f4-5fd9-735e-b9c3-f7a360817ebd" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019de4d1-0814-7c98-b0db-a8d42cc983dd" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/FairValueNarrativeDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#FairValueNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/FairValueNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c91f4-5fd9-73e2-921a-da99c05b2cd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c91f4-5fd9-73e2-921a-da99c05b2cd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c91f4-5fd9-73e2-921a-da99c05b2cd2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c91f4-5fd9-73e2-921a-da99c05b2cd2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c91f4-5fd9-73e2-921a-da99c05b2cd2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c91f4-5fd9-78d1-b7c3-61e3d1c67703" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c91f4-5fd9-73e2-921a-da99c05b2cd2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c91f4-5fd9-78d1-b7c3-61e3d1c67703" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019c91f4-5fd9-74f2-8319-112a0a6bbc0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c91f4-5fd9-78d1-b7c3-61e3d1c67703" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019c91f4-5fd9-74f2-8319-112a0a6bbc0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c91f4-5fd9-7802-bca7-4779a9d983aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c91f4-5fd9-7802-bca7-4779a9d983aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c91f4-5fd9-7802-bca7-4779a9d983aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c91f4-5fd9-7802-bca7-4779a9d983aa" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c91f4-5fd9-7802-bca7-4779a9d983aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c91f4-5fd9-75dd-b138-7adf8f088d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c91f4-5fd9-7802-bca7-4779a9d983aa" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c91f4-5fd9-75dd-b138-7adf8f088d1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019c91f4-5fd9-7c14-bb94-5bb8d5234ad1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c91f4-5fd9-75dd-b138-7adf8f088d1d" xlink:to="loc_us-gaap_SeniorNotesMember_019c91f4-5fd9-7c14-bb94-5bb8d5234ad1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_us-gaap_CreditFacilityAxis_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d" xlink:to="loc_us-gaap_CreditFacilityDomain_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c91f4-5fd9-7970-8bfd-b38f2381f7e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c91f4-5fd9-7ea9-89a7-dd3db2e2d23d" xlink:to="loc_us-gaap_CreditFacilityDomain_019c91f4-5fd9-7970-8bfd-b38f2381f7e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c91f4-5fd9-7fc1-9ff2-9407dc1891ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c91f4-5fd9-7970-8bfd-b38f2381f7e4" xlink:to="loc_us-gaap_LineOfCreditMember_019c91f4-5fd9-7fc1-9ff2-9407dc1891ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c91f4-5fd9-7754-a5a4-57a2f86e02b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c91f4-5fd9-7754-a5a4-57a2f86e02b3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c91f4-5fd9-7754-a5a4-57a2f86e02b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c91f4-5fd9-7754-a5a4-57a2f86e02b3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c91f4-5fd9-7754-a5a4-57a2f86e02b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c91f4-5fd9-7474-9a14-b765dd37b2bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c91f4-5fd9-7754-a5a4-57a2f86e02b3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c91f4-5fd9-7474-9a14-b765dd37b2bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_UnsecuredCreditFacilityMember_019c91f4-5fd9-71ca-ae11-627144e2fc2f" xlink:href="rop-20260331.xsd#rop_UnsecuredCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c91f4-5fd9-7474-9a14-b765dd37b2bd" xlink:to="loc_rop_UnsecuredCreditFacilityMember_019c91f4-5fd9-71ca-ae11-627144e2fc2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7ef7-a34b-6b5625394e3d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7ef7-a34b-6b5625394e3d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7ef7-a34b-6b5625394e3d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7ef7-a34b-6b5625394e3d" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7ef7-a34b-6b5625394e3d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-74ff-b629-50ade27cd25c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7ef7-a34b-6b5625394e3d" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-74ff-b629-50ade27cd25c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IndicorMember_019c91f4-5fd9-7aea-afe2-72e8384836d3" xlink:href="rop-20260331.xsd#rop_IndicorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-74ff-b629-50ade27cd25c" xlink:to="loc_rop_IndicorMember_019c91f4-5fd9-7aea-afe2-72e8384836d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019dd16b-1498-7205-8007-350ccaaa597d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7f5b-8203-d43576938c69" xlink:to="loc_srt_CounterpartyNameAxis_019dd16b-1498-7205-8007-350ccaaa597d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019dd16b-1498-7205-8007-350ccaaa597d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019dd16b-1498-7205-8007-350ccaaa597d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019dd16b-1498-7205-8007-350ccaaa597d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019dd16b-1498-7ac4-8881-0d345ed48295" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019dd16b-1498-7205-8007-350ccaaa597d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019dd16b-1498-7ac4-8881-0d345ed48295" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_OutgoMember_019dc2d5-4b9a-7a40-a65b-0483e33bcd26" xlink:href="rop-20260331.xsd#rop_OutgoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019dd16b-1498-7ac4-8881-0d345ed48295" xlink:to="loc_rop_OutgoMember_019dc2d5-4b9a-7a40-a65b-0483e33bcd26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019c91f4-5fd9-77e0-b322-55e978bbd885" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_LongTermDebtFairValue_019c91f4-5fd9-77e0-b322-55e978bbd885" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_019c91f4-5fd9-726b-b99d-20da935f4950" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_019c91f4-5fd9-726b-b99d-20da935f4950" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c91f4-5fd9-7403-b377-a1c62f363029" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c91f4-5fd9-7403-b377-a1c62f363029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables_019dd168-4d74-7224-bae1-f5ea2ac744ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables_019dd168-4d74-7224-bae1-f5ea2ac744ab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableFromSecuritization_019dd16a-e5a9-7f49-a567-d005a3bc9c6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableFromSecuritization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7e89-8192-44b674c7ffe1" xlink:to="loc_us-gaap_AccountsReceivableFromSecuritization_019dd16a-e5a9-7f49-a567-d005a3bc9c6e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/FairValueScheduleofChangeinFairValuefortheEquityInvestmentDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#FairValueScheduleofChangeinFairValuefortheEquityInvestmentDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/FairValueScheduleofChangeinFairValuefortheEquityInvestmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7952-a7fa-a57d856e27bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7b32-af8f-4f085e496c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7952-a7fa-a57d856e27bd" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7b32-af8f-4f085e496c9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7815-accb-1da00ae1f939" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c91f4-5fd9-7b32-af8f-4f085e496c9e" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7815-accb-1da00ae1f939" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7815-accb-1da00ae1f939_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7815-accb-1da00ae1f939" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7815-accb-1da00ae1f939_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7506-b29f-d0d08f4d4642" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c91f4-5fd9-7815-accb-1da00ae1f939" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7506-b29f-d0d08f4d4642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IndicorMember_019c91f4-5fd9-71fa-b478-3ca8b201298c" xlink:href="rop-20260331.xsd#rop_IndicorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c91f4-5fd9-7506-b29f-d0d08f4d4642" xlink:to="loc_rop_IndicorMember_019c91f4-5fd9-71fa-b478-3ca8b201298c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_EquityMethodInvestmentsRollForward_019c91f4-5fd9-7cfc-825d-f59b2184c0c1" xlink:href="rop-20260331.xsd#rop_EquityMethodInvestmentsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c91f4-5fd9-7952-a7fa-a57d856e27bd" xlink:to="loc_rop_EquityMethodInvestmentsRollForward_019c91f4-5fd9-7cfc-825d-f59b2184c0c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019c91f4-5fd9-747a-bee6-4e80f92d41b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_EquityMethodInvestmentsRollForward_019c91f4-5fd9-7cfc-825d-f59b2184c0c1" xlink:to="loc_us-gaap_EquityMethodInvestments_019c91f4-5fd9-747a-bee6-4e80f92d41b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019d24f8-197c-7a84-bc1e-053bce6ca1ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_EquityMethodInvestmentsRollForward_019c91f4-5fd9-7cfc-825d-f59b2184c0c1" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019d24f8-197c-7a84-bc1e-053bce6ca1ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019c91f4-5fd9-7514-abab-bcdcda35e7ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestments"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/ReportableSegmentsDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#ReportableSegmentsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/ReportableSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019c91f4-5fd9-7d91-82b1-0cc5c7f5614b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019c91f4-5fd9-7d91-82b1-0cc5c7f5614b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c91f4-5fd9-75e1-b206-c383a3ecf8dd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019c91f4-5fd9-7d91-82b1-0cc5c7f5614b" xlink:to="loc_srt_ConsolidationItemsAxis_019c91f4-5fd9-75e1-b206-c383a3ecf8dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-75e1-b206-c383a3ecf8dd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c91f4-5fd9-75e1-b206-c383a3ecf8dd" xlink:to="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-75e1-b206-c383a3ecf8dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-7541-b9dc-f9418c4c6732" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c91f4-5fd9-75e1-b206-c383a3ecf8dd" xlink:to="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-7541-b9dc-f9418c4c6732" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019c91f4-5fd9-71ef-835d-cf994e80736e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-7541-b9dc-f9418c4c6732" xlink:to="loc_us-gaap_OperatingSegmentsMember_019c91f4-5fd9-71ef-835d-cf994e80736e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019c91f4-5fd9-7e4e-a2f6-9e68a9d7add0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c91f4-5fd9-7541-b9dc-f9418c4c6732" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019c91f4-5fd9-7e4e-a2f6-9e68a9d7add0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-7184-b034-1fb46b6ea4bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019c91f4-5fd9-7d91-82b1-0cc5c7f5614b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-7184-b034-1fb46b6ea4bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7184-b034-1fb46b6ea4bf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-7184-b034-1fb46b6ea4bf" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7184-b034-1fb46b6ea4bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7575-8de5-12b908ad74db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-5fd9-7184-b034-1fb46b6ea4bf" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7575-8de5-12b908ad74db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-5fd9-7561-95ac-bb6f514a176a" xlink:href="rop-20260331.xsd#rop_ApplicationSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7575-8de5-12b908ad74db" xlink:to="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-5fd9-7561-95ac-bb6f514a176a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NetworkSoftwareSegmentMember_019c91f4-5fd9-7cbf-a7f6-de714348c8c3" xlink:href="rop-20260331.xsd#rop_NetworkSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7575-8de5-12b908ad74db" xlink:to="loc_rop_NetworkSoftwareSegmentMember_019c91f4-5fd9-7cbf-a7f6-de714348c8c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-5fd9-7024-9c8b-90f491c9f7b4" xlink:href="rop-20260331.xsd#rop_TechnologyEnabledProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-5fd9-7575-8de5-12b908ad74db" xlink:to="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-5fd9-7024-9c8b-90f491c9f7b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NumberOfReportableSegmentsNotDisclosedFlag_019d253d-f973-718e-ada8-c92da429fdac" xlink:href="rop-20260331.xsd#rop_NumberOfReportableSegmentsNotDisclosedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_rop_NumberOfReportableSegmentsNotDisclosedFlag_019d253d-f973-718e-ada8-c92da429fdac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c91f4-5fd9-778b-a721-7bcb2fe8da4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c91f4-5fd9-778b-a721-7bcb2fe8da4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019c91f4-5fd9-7afc-b7ed-a3b99aba1c99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_CostOfRevenue_019c91f4-5fd9-7afc-b7ed-a3b99aba1c99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019c91f4-5fd9-7c03-9e4c-23ac88bc264c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019c91f4-5fd9-7c03-9e4c-23ac88bc264c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SegmentOperatingProfit_019c91f4-5fd9-783c-a3f7-27fe53e4ebd9" xlink:href="rop-20260331.xsd#rop_SegmentOperatingProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_rop_SegmentOperatingProfit_019c91f4-5fd9-783c-a3f7-27fe53e4ebd9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019c91f4-5fd9-7407-ba34-58401d1ff7da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019c91f4-5fd9-7407-ba34-58401d1ff7da" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireOtherProductiveAssets_019c91f4-609b-7f86-b9e6-9dc28a257e7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireOtherProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_PaymentsToAcquireOtherProductiveAssets_019c91f4-609b-7f86-b9e6-9dc28a257e7f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAdditions_019c91f4-609b-78c3-a2b4-615d6331440e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAdditions_019c91f4-609b-78c3-a2b4-615d6331440e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019c91f4-609b-76f5-9465-91c976b99089" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019c91f4-609b-76f5-9465-91c976b99089" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_AssetsExcludingAssetsHeldForSale_019c91f4-609b-7c15-aa29-b1f133f4daaf" xlink:href="rop-20260331.xsd#rop_AssetsExcludingAssetsHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c91f4-5fd9-754f-a4fb-3d082b26644f" xlink:to="loc_rop_AssetsExcludingAssetsHeldForSale_019c91f4-609b-7c15-aa29-b1f133f4daaf" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#RevenuesfromContractsScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c91f4-609b-7be3-8fb8-999b5643af88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c91f4-609b-7d34-9f0e-96da08f6e59f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c91f4-609b-7be3-8fb8-999b5643af88" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c91f4-609b-7d34-9f0e-96da08f6e59f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c91f4-609b-7e6a-b5dc-00c5e60829ee" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c91f4-609b-7d34-9f0e-96da08f6e59f" xlink:to="loc_srt_ProductOrServiceAxis_019c91f4-609b-7e6a-b5dc-00c5e60829ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c91f4-609b-7e6a-b5dc-00c5e60829ee_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c91f4-609b-7e6a-b5dc-00c5e60829ee" xlink:to="loc_srt_ProductsAndServicesDomain_019c91f4-609b-7e6a-b5dc-00c5e60829ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c91f4-609b-78ae-b917-f8da7aff2cad" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c91f4-609b-7e6a-b5dc-00c5e60829ee" xlink:to="loc_srt_ProductsAndServicesDomain_019c91f4-609b-78ae-b917-f8da7aff2cad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SoftwareRelatedMember_019c91f4-609b-7e50-8910-cd3ca3eab77e" xlink:href="rop-20260331.xsd#rop_SoftwareRelatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c91f4-609b-78ae-b917-f8da7aff2cad" xlink:to="loc_rop_SoftwareRelatedMember_019c91f4-609b-7e50-8910-cd3ca3eab77e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SoftwareRelatedRecurringMember_019c91f4-609b-749e-a259-00a03259acc2" xlink:href="rop-20260331.xsd#rop_SoftwareRelatedRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_SoftwareRelatedMember_019c91f4-609b-7e50-8910-cd3ca3eab77e" xlink:to="loc_rop_SoftwareRelatedRecurringMember_019c91f4-609b-749e-a259-00a03259acc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SoftwareRelatedReoccurringMember_019c91f4-609b-7611-a7aa-70742949366f" xlink:href="rop-20260331.xsd#rop_SoftwareRelatedReoccurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_SoftwareRelatedMember_019c91f4-609b-7e50-8910-cd3ca3eab77e" xlink:to="loc_rop_SoftwareRelatedReoccurringMember_019c91f4-609b-7611-a7aa-70742949366f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SoftwareRelatedNonRecurringMember_019c91f4-609b-727d-9196-0f59b1f7f2ac" xlink:href="rop-20260331.xsd#rop_SoftwareRelatedNonRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_SoftwareRelatedMember_019c91f4-609b-7e50-8910-cd3ca3eab77e" xlink:to="loc_rop_SoftwareRelatedNonRecurringMember_019c91f4-609b-727d-9196-0f59b1f7f2ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ProductRevenueMember_019c91f4-609b-7fa2-b949-c207216935c7" xlink:href="rop-20260331.xsd#rop_ProductRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c91f4-609b-78ae-b917-f8da7aff2cad" xlink:to="loc_rop_ProductRevenueMember_019c91f4-609b-7fa2-b949-c207216935c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-609b-7a31-9458-5b2d5eb6564b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c91f4-609b-7d34-9f0e-96da08f6e59f" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-609b-7a31-9458-5b2d5eb6564b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-609b-7a31-9458-5b2d5eb6564b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-609b-7a31-9458-5b2d5eb6564b" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-609b-7a31-9458-5b2d5eb6564b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c91f4-609b-759b-bc1a-e978eab30ccd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c91f4-609b-7a31-9458-5b2d5eb6564b" xlink:to="loc_us-gaap_SegmentDomain_019c91f4-609b-759b-bc1a-e978eab30ccd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-609b-773d-87e3-53aca3b85c3d" xlink:href="rop-20260331.xsd#rop_ApplicationSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-609b-759b-bc1a-e978eab30ccd" xlink:to="loc_rop_ApplicationSoftwareSegmentMember_019c91f4-609b-773d-87e3-53aca3b85c3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NetworkSoftwareSegmentMember_019c91f4-609b-7c29-a9e0-7726595ab343" xlink:href="rop-20260331.xsd#rop_NetworkSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-609b-759b-bc1a-e978eab30ccd" xlink:to="loc_rop_NetworkSoftwareSegmentMember_019c91f4-609b-7c29-a9e0-7726595ab343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-609b-73ab-94a1-55ebd68fbd0d" xlink:href="rop-20260331.xsd#rop_TechnologyEnabledProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c91f4-609b-759b-bc1a-e978eab30ccd" xlink:to="loc_rop_TechnologyEnabledProductsSegmentMember_019c91f4-609b-73ab-94a1-55ebd68fbd0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c91f4-609b-702e-9cd7-6916d2799e08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c91f4-609b-7be3-8fb8-999b5643af88" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c91f4-609b-702e-9cd7-6916d2799e08" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails" xlink:type="simple" xlink:href="rop-20260331.xsd#RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019c91f4-609b-7b88-b5f7-8656db9ed01c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019c91f4-609b-7b88-b5f7-8656db9ed01c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019c91f4-609b-70d4-aac9-250bb70ec770" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019c91f4-609b-7b88-b5f7-8656db9ed01c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019c91f4-609b-70d4-aac9-250bb70ec770" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019c91f4-609b-7a0a-ac7e-91aa97e76a87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019c91f4-609b-7a0a-ac7e-91aa97e76a87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c91f4-609b-7d91-9394-0e849e4fae38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c91f4-609b-7d91-9394-0e849e4fae38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019c91f4-609b-7276-bd7f-e160132cfb4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019c91f4-609b-7276-bd7f-e160132cfb4f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1" xlink:type="simple" xlink:href="rop-20260331.xsd#RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019c91f4-609b-7b88-b5f7-8656db9ed01c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019c91f4-609b-7b88-b5f7-8656db9ed01c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019c91f4-609b-7a0a-ac7e-91aa97e76a87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019c91f4-609b-7a0a-ac7e-91aa97e76a87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c91f4-609b-7d91-9394-0e849e4fae38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c91f4-609b-7d91-9394-0e849e4fae38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019c91f4-609b-7276-bd7f-e160132cfb4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019c91f4-609b-7199-9c19-424675259168" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019c91f4-609b-7276-bd7f-e160132cfb4f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_L.NeilHunnMember_019c91f4-5e5e-7fb4-b0b6-5b82e19c2ad9" xlink:href="rop-20260331.xsd#rop_L.NeilHunnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_rop_L.NeilHunnMember_019c91f4-5e5e-7fb4-b0b6-5b82e19c2ad9" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
