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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:83995549-d617-4cff-a08a-b4f8305655a3,g:324adaf9-13a7-48c7-8828-c86fda19197d-->
<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://hcsgcorp.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="extended" id="i805cdc6f650c4152aaf257f08e73a98f_ConsolidatedStatementsofStockholdersEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_2ca52c89-a16c-4590-9ff6-14a25bbfccff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2ca52c89-a16c-4590-9ff6-14a25bbfccff" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_e4d2f34d-3b9a-4939-8b54-40b072fd3d11" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_SharesIssued_e4d2f34d-3b9a-4939-8b54-40b072fd3d11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_042eb656-8625-4d7f-86eb-e73651be0d59" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockholdersEquity_042eb656-8625-4d7f-86eb-e73651be0d59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_0fb940da-07e3-4fb6-91a0-7ff1b782649e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_0fb940da-07e3-4fb6-91a0-7ff1b782649e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_937dcee0-2deb-4f46-99fa-5b750bd1dddc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_0fb940da-07e3-4fb6-91a0-7ff1b782649e" xlink:to="loc_us-gaap_NetIncomeLoss_937dcee0-2deb-4f46-99fa-5b750bd1dddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_0cf17d58-11c1-4df1-90e1-4df468875a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_0fb940da-07e3-4fb6-91a0-7ff1b782649e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_0cf17d58-11c1-4df1-90e1-4df468875a9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_61ae9c51-6d02-4f95-9dfe-4a8c1e76c8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_0fb940da-07e3-4fb6-91a0-7ff1b782649e" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_61ae9c51-6d02-4f95-9dfe-4a8c1e76c8f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_28d16beb-183e-4fba-b67f-a9131545d1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_28d16beb-183e-4fba-b67f-a9131545d1a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_06564f14-4f06-447c-9c3e-82b9dd62ecca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_06564f14-4f06-447c-9c3e-82b9dd62ecca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_71a6f582-67f4-47ff-b386-3469680d9edd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_71a6f582-67f4-47ff-b386-3469680d9edd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_0086e8f1-e6cd-4b38-9172-6b85376302b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_0086e8f1-e6cd-4b38-9172-6b85376302b9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_c69f1ea5-f6af-496a-a51f-c27f2b776543" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_c69f1ea5-f6af-496a-a51f-c27f2b776543" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_0f783e6e-a4ac-4a22-aa55-d929c21735d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_0f783e6e-a4ac-4a22-aa55-d929c21735d2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_8d7bdbe7-f3fc-40c9-a2e4-7ea6d5a9c857" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_8d7bdbe7-f3fc-40c9-a2e4-7ea6d5a9c857" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_47763c64-6383-4ae4-aec2-cd786e955fcc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_DividendsCommonStockCash_47763c64-6383-4ae4-aec2-cd786e955fcc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_7fbede05-2b71-40c1-b78a-519cee80ea7a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_7fbede05-2b71-40c1-b78a-519cee80ea7a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_AdjustmentsToAdditionalPaidInCapitalContingentSharesSettledPursuantToAcquisition_b2b8c76b-c2b8-4287-8112-268029c33049" xlink:href="hcsg-20211231.xsd#hcsg_AdjustmentsToAdditionalPaidInCapitalContingentSharesSettledPursuantToAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_hcsg_AdjustmentsToAdditionalPaidInCapitalContingentSharesSettledPursuantToAcquisition_b2b8c76b-c2b8-4287-8112-268029c33049" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9e9340fc-584c-4a76-bf7e-a89a4f0587c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9e9340fc-584c-4a76-bf7e-a89a4f0587c0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_185fbb04-ba94-4977-bf15-2188414d56ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34ed306-beaa-46f5-821c-c172cb5ffda5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_185fbb04-ba94-4977-bf15-2188414d56ab" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_7699f7ea-7311-41cc-bfe3-9369a36cf4f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_525a3eda-2878-4b79-9cdd-b903927f6996" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_764d4ba0-2eb6-4c16-a676-6e93b44adf53" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2ca52c89-a16c-4590-9ff6-14a25bbfccff" xlink:to="loc_us-gaap_StatementTable_764d4ba0-2eb6-4c16-a676-6e93b44adf53" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_9b98bde7-8ff0-4dcc-a83a-33ae5650c430" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_764d4ba0-2eb6-4c16-a676-6e93b44adf53" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_9b98bde7-8ff0-4dcc-a83a-33ae5650c430" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9b98bde7-8ff0-4dcc-a83a-33ae5650c430_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9b98bde7-8ff0-4dcc-a83a-33ae5650c430" xlink:to="loc_us-gaap_EquityComponentDomain_9b98bde7-8ff0-4dcc-a83a-33ae5650c430_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9b98bde7-8ff0-4dcc-a83a-33ae5650c430" xlink:to="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_d4dc63e6-1ec7-431e-a074-fbeed22c2ae8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:to="loc_us-gaap_CommonStockMember_d4dc63e6-1ec7-431e-a074-fbeed22c2ae8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_5036bbed-b301-47c5-980d-73c7c5bdfd46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_5036bbed-b301-47c5-980d-73c7c5bdfd46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c004e373-81d4-49ed-91f9-dd914d03bd89" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c004e373-81d4-49ed-91f9-dd914d03bd89" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_3b3a283e-fc5c-487c-8505-4d768a45ea24" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:to="loc_us-gaap_RetainedEarningsMember_3b3a283e-fc5c-487c-8505-4d768a45ea24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_ff48701a-43ac-472f-bfe0-33aebd9ef6ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4c1a7f0a-d822-4a00-bfb7-ee6e00c3922c" xlink:to="loc_us-gaap_TreasuryStockMember_ff48701a-43ac-472f-bfe0-33aebd9ef6ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_b9e83d69-6d73-404c-9c8c-e773debf1533" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_764d4ba0-2eb6-4c16-a676-6e93b44adf53" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_b9e83d69-6d73-404c-9c8c-e773debf1533" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_b9e83d69-6d73-404c-9c8c-e773debf1533_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_b9e83d69-6d73-404c-9c8c-e773debf1533" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_b9e83d69-6d73-404c-9c8c-e773debf1533_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_13c27aee-758b-4913-b421-1c1a1466c4ae" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_b9e83d69-6d73-404c-9c8c-e773debf1533" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_13c27aee-758b-4913-b421-1c1a1466c4ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_ef1f229e-2513-42ad-8446-3efdf297e54b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_13c27aee-758b-4913-b421-1c1a1466c4ae" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_ef1f229e-2513-42ad-8446-3efdf297e54b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_f1cbbe06-f5d4-44a5-a98d-e1d5978367c6" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_13c27aee-758b-4913-b421-1c1a1466c4ae" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_f1cbbe06-f5d4-44a5-a98d-e1d5978367c6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#DescriptionofBusinessandSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended" id="iddf437f60b384d65a4cfb215ea3fd55e_DescriptionofBusinessandSignificantAccountingPoliciesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:href="hcsg-20211231.xsd#hcsg_ScheduleofAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerRenewalTerm_12b41b04-30c8-4d00-bd2b-9baac88a1023" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_RevenueFromContractWithCustomerRenewalTerm_12b41b04-30c8-4d00-bd2b-9baac88a1023" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod_743ed00f-6483-482c-9d37-3e36c105a811" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod_743ed00f-6483-482c-9d37-3e36c105a811" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice_eeb6a769-1569-41fe-8f6b-f6714b9e4205" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice_eeb6a769-1569-41fe-8f6b-f6714b9e4205" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_fa3a143c-9ddf-4646-a7ea-7d3f0d3e386e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_NumberOfReportableSegments_fa3a143c-9ddf-4646-a7ea-7d3f0d3e386e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_df394f1f-0c9f-40ed-abfb-e234af9f7198" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_df394f1f-0c9f-40ed-abfb-e234af9f7198" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesUnrealizedGainLoss_b3a21602-db80-41d0-9363-acc9fd46c0e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MarketableSecuritiesUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_MarketableSecuritiesUnrealizedGainLoss_b3a21602-db80-41d0-9363-acc9fd46c0e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenuePerformanceObligationPaymentTerms_669cd208-916c-4b89-a702-773d9f5337d3" xlink:href="hcsg-20211231.xsd#hcsg_RevenuePerformanceObligationPaymentTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_RevenuePerformanceObligationPaymentTerms_669cd208-916c-4b89-a702-773d9f5337d3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PeriodOfAmortizationOfInventoriesAndSupplies_910cc322-26dd-4c83-bafb-c82e0feef25b" xlink:href="hcsg-20211231.xsd#hcsg_PeriodOfAmortizationOfInventoriesAndSupplies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_PeriodOfAmortizationOfInventoriesAndSupplies_910cc322-26dd-4c83-bafb-c82e0feef25b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_bde1e4ea-e0f1-499d-a174-4edbb05d368e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_bde1e4ea-e0f1-499d-a174-4edbb05d368e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_7143e49f-5c50-4cea-86ea-d3391f97e517" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_Depreciation_7143e49f-5c50-4cea-86ea-d3391f97e517" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_53d68df4-0785-42e7-b9c7-b0d4f09053cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_AdvertisingExpense_53d68df4-0785-42e7-b9c7-b0d4f09053cc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_3ed6725d-c118-4431-b77f-f4dd11737fee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TangibleAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_3ed6725d-c118-4431-b77f-f4dd11737fee" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_409adf5c-097c-4324-9047-39c7fe8b60ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_409adf5c-097c-4324-9047-39c7fe8b60ea" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ConcentrationRiskNumberofFinancialInstitutionsHoldingCashandCashEquivalentsandMarketableSecurities_4747b306-0430-4ef1-9a77-240f435db1e9" xlink:href="hcsg-20211231.xsd#hcsg_ConcentrationRiskNumberofFinancialInstitutionsHoldingCashandCashEquivalentsandMarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_ConcentrationRiskNumberofFinancialInstitutionsHoldingCashandCashEquivalentsandMarketableSecurities_4747b306-0430-4ef1-9a77-240f435db1e9" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_d49b35e5-bcfe-410d-a70e-ac61201f0ff9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_d49b35e5-bcfe-410d-a70e-ac61201f0ff9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_83e8c3d0-18d5-41ca-8c20-6fae5bb5dff1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_83e8c3d0-18d5-41ca-8c20-6fae5bb5dff1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableRelatedParties_fe54c5c8-deb9-4404-98eb-d6ec5a302241" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_AccountsReceivableRelatedParties_fe54c5c8-deb9-4404-98eb-d6ec5a302241" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableRelatedParties_795fd976-74fb-4b05-b7aa-3ecb46988820" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_us-gaap_NotesReceivableRelatedParties_795fd976-74fb-4b05-b7aa-3ecb46988820" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:href="hcsg-20211231.xsd#hcsg_ScheduleofAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesLineItems_efffb4d3-4582-401a-8bb4-0ed52ec3c047" xlink:to="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_3897eaf8-4dc5-4582-806f-80881aa7cce4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:to="loc_srt_RangeAxis_3897eaf8-4dc5-4582-806f-80881aa7cce4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3897eaf8-4dc5-4582-806f-80881aa7cce4_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3897eaf8-4dc5-4582-806f-80881aa7cce4" xlink:to="loc_srt_RangeMember_3897eaf8-4dc5-4582-806f-80881aa7cce4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1abb8374-7cfe-4bab-8a23-d25587f60245" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3897eaf8-4dc5-4582-806f-80881aa7cce4" xlink:to="loc_srt_RangeMember_1abb8374-7cfe-4bab-8a23-d25587f60245" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_fea98dc0-46cf-4aee-b46d-1a714e3eea5d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1abb8374-7cfe-4bab-8a23-d25587f60245" xlink:to="loc_srt_MinimumMember_fea98dc0-46cf-4aee-b46d-1a714e3eea5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ba103d1e-f7fc-41d4-b1d9-8aed263f50c0" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1abb8374-7cfe-4bab-8a23-d25587f60245" xlink:to="loc_srt_MaximumMember_ba103d1e-f7fc-41d4-b1d9-8aed263f50c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_83462a61-4153-4f70-840f-ed6b384b45a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_83462a61-4153-4f70-840f-ed6b384b45a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_83462a61-4153-4f70-840f-ed6b384b45a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_83462a61-4153-4f70-840f-ed6b384b45a5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_83462a61-4153-4f70-840f-ed6b384b45a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_54a762af-cd0c-4a1e-98f8-70190cb4c4cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_83462a61-4153-4f70-840f-ed6b384b45a5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_54a762af-cd0c-4a1e-98f8-70190cb4c4cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_HousekeepingAndDietaryEquipmentMember_48aa3a36-c36c-4847-a90e-72027b5432f4" xlink:href="hcsg-20211231.xsd#hcsg_HousekeepingAndDietaryEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_54a762af-cd0c-4a1e-98f8-70190cb4c4cc" xlink:to="loc_hcsg_HousekeepingAndDietaryEquipmentMember_48aa3a36-c36c-4847-a90e-72027b5432f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ComputerHardwareAndSoftwareMember_88d653d2-a1b4-4b34-9787-8e86ae470a6a" xlink:href="hcsg-20211231.xsd#hcsg_ComputerHardwareAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_54a762af-cd0c-4a1e-98f8-70190cb4c4cc" xlink:to="loc_hcsg_ComputerHardwareAndSoftwareMember_88d653d2-a1b4-4b34-9787-8e86ae470a6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VehiclesMember_d3309324-d5c6-4f65-b7aa-9d4500da14c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_54a762af-cd0c-4a1e-98f8-70190cb4c4cc" xlink:to="loc_us-gaap_VehiclesMember_d3309324-d5c6-4f65-b7aa-9d4500da14c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_7353fc40-ef76-44b6-8431-94d4d55d3823" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_7353fc40-ef76-44b6-8431-94d4d55d3823" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_7353fc40-ef76-44b6-8431-94d4d55d3823_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_7353fc40-ef76-44b6-8431-94d4d55d3823" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_7353fc40-ef76-44b6-8431-94d4d55d3823_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_ef95567f-4c99-414a-a58d-d906a0a32705" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_7353fc40-ef76-44b6-8431-94d4d55d3823" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_ef95567f-4c99-414a-a58d-d906a0a32705" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_0d2e5f13-0099-420d-9b14-86643d53a1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_ef95567f-4c99-414a-a58d-d906a0a32705" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_0d2e5f13-0099-420d-9b14-86643d53a1ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplierConcentrationRiskMember_12f78a42-81be-4a81-bece-00ba9c8ed253" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SupplierConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_ef95567f-4c99-414a-a58d-d906a0a32705" xlink:to="loc_us-gaap_SupplierConcentrationRiskMember_12f78a42-81be-4a81-bece-00ba9c8ed253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9b830770-001a-416e-a174-70ee59427681" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9b830770-001a-416e-a174-70ee59427681" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_9b830770-001a-416e-a174-70ee59427681_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9b830770-001a-416e-a174-70ee59427681" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_9b830770-001a-416e-a174-70ee59427681_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d45cbd60-b604-4d17-8f96-bbca8e4b53c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9b830770-001a-416e-a174-70ee59427681" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d45cbd60-b604-4d17-8f96-bbca8e4b53c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_5cd4febe-afd5-4865-a645-28208873eaf3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d45cbd60-b604-4d17-8f96-bbca8e4b53c4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_5cd4febe-afd5-4865-a645-28208873eaf3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsTotalMember_4086379b-f30f-4b91-8482-0d43673ad53b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsTotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d45cbd60-b604-4d17-8f96-bbca8e4b53c4" xlink:to="loc_us-gaap_CostOfGoodsTotalMember_4086379b-f30f-4b91-8482-0d43673ad53b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_987f4999-d35d-4fa8-a957-c9cdb567e93a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_hcsg_ScheduleofAccountingPoliciesTable_1e359302-38d8-47b7-a34b-24dc223e2ecb" xlink:to="loc_srt_MajorCustomersAxis_987f4999-d35d-4fa8-a957-c9cdb567e93a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_987f4999-d35d-4fa8-a957-c9cdb567e93a_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_987f4999-d35d-4fa8-a957-c9cdb567e93a" xlink:to="loc_srt_NameOfMajorCustomerDomain_987f4999-d35d-4fa8-a957-c9cdb567e93a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_d980c4a4-3818-4d39-a5ab-6f978a4d8baf" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_987f4999-d35d-4fa8-a957-c9cdb567e93a" xlink:to="loc_srt_NameOfMajorCustomerDomain_d980c4a4-3818-4d39-a5ab-6f978a4d8baf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_SyscoMember_ab0d945a-266f-4d67-b00f-1b0b7829448d" xlink:href="hcsg-20211231.xsd#hcsg_SyscoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d980c4a4-3818-4d39-a5ab-6f978a4d8baf" xlink:to="loc_hcsg_SyscoMember_ab0d945a-266f-4d67-b00f-1b0b7829448d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_GenesisHealthcareIncMember_86513ba1-2d51-4517-b6e4-09c1b31cb20a" xlink:href="hcsg-20211231.xsd#hcsg_GenesisHealthcareIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d980c4a4-3818-4d39-a5ab-6f978a4d8baf" xlink:to="loc_hcsg_GenesisHealthcareIncMember_86513ba1-2d51-4517-b6e4-09c1b31cb20a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesScheduleofCumulativeEffectofInitiallyApplyingNewGuidanceDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#DescriptionofBusinessandSignificantAccountingPoliciesScheduleofCumulativeEffectofInitiallyApplyingNewGuidanceDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesScheduleofCumulativeEffectofInitiallyApplyingNewGuidanceDetails" xlink:type="extended" id="i93ea57b36dee4a46813c5fb8ea426135_DescriptionofBusinessandSignificantAccountingPoliciesScheduleofCumulativeEffectofInitiallyApplyingNewGuidanceDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_64383747-2c62-4e7c-a974-40621e557e71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_64383747-2c62-4e7c-a974-40621e557e71" xlink:to="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_4b9bbc76-6821-42e9-81e1-f210c96c1a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_4b9bbc76-6821-42e9-81e1-f210c96c1a9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_39f8fc77-9a1d-4125-8b23-da29ba347a74" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_39f8fc77-9a1d-4125-8b23-da29ba347a74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_7134b4ff-d37b-41b7-82f2-ff5f1fb8c58a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_7134b4ff-d37b-41b7-82f2-ff5f1fb8c58a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_7562f138-9341-4794-8708-10661103dacd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_7562f138-9341-4794-8708-10661103dacd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_403b66c3-f6ac-4c29-a713-88513c4ea66f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04ae2bac-31a1-41d9-a222-0b3cdc6cfb8a" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_403b66c3-f6ac-4c29-a713-88513c4ea66f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_cfe95a9a-2ce5-4149-9567-97c7dfc77fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_64383747-2c62-4e7c-a974-40621e557e71" xlink:to="loc_us-gaap_StockholdersEquityAbstract_cfe95a9a-2ce5-4149-9567-97c7dfc77fbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3e336a73-f287-466a-b660-a3a0cfdd233e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_cfe95a9a-2ce5-4149-9567-97c7dfc77fbe" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3e336a73-f287-466a-b660-a3a0cfdd233e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_40cc75c6-b74f-43b5-95ce-58da91728c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_64383747-2c62-4e7c-a974-40621e557e71" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_40cc75c6-b74f-43b5-95ce-58da91728c0c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4929bbc8-c655-4e27-b053-d831a5a7992b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_40cc75c6-b74f-43b5-95ce-58da91728c0c" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4929bbc8-c655-4e27-b053-d831a5a7992b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4929bbc8-c655-4e27-b053-d831a5a7992b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4929bbc8-c655-4e27-b053-d831a5a7992b" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4929bbc8-c655-4e27-b053-d831a5a7992b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c4b378ac-54f1-4d35-8732-0594c0483bc8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4929bbc8-c655-4e27-b053-d831a5a7992b" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c4b378ac-54f1-4d35-8732-0594c0483bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_46930e95-6106-47ba-985b-ac3d6bb13738" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c4b378ac-54f1-4d35-8732-0594c0483bc8" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_46930e95-6106-47ba-985b-ac3d6bb13738" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_0d24d030-684b-4dc9-91ef-6a63812f3bd1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c4b378ac-54f1-4d35-8732-0594c0483bc8" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_0d24d030-684b-4dc9-91ef-6a63812f3bd1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/RevenueAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#RevenueAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/RevenueAdditionalInformationDetails" xlink:type="extended" id="i7f5aaa5c4cbb4e06aadff02f7572d65c_RevenueAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_54826aed-ce79-4206-b5de-668b84689516" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_54826aed-ce79-4206-b5de-668b84689516" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerRenewalTerm_bffb2d44-f47d-4a72-8aac-399f972e86b9" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_hcsg_RevenueFromContractWithCustomerRenewalTerm_bffb2d44-f47d-4a72-8aac-399f972e86b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod_210f49cf-09b8-4bcb-aac8-d02afb341a9e" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_hcsg_RevenueFromContractWithCustomerCancellationNoticePeriod_210f49cf-09b8-4bcb-aac8-d02afb341a9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice_179207a5-96b0-4a0f-baf8-75ee332830ec" xlink:href="hcsg-20211231.xsd#hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_hcsg_RevenueFromContractWithCustomerInitialPeriodPrecedingCancellationNotice_179207a5-96b0-4a0f-baf8-75ee332830ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_6e2d5773-5d30-42fa-87a6-bb99ce4de6b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_us-gaap_ContractWithCustomerLiability_6e2d5773-5d30-42fa-87a6-bb99ce4de6b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ee7a1492-15cc-4c42-8330-79079674b32b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ee7a1492-15cc-4c42-8330-79079674b32b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_747b92c9-8dfb-438a-8633-83c4c7e721c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuePerformanceObligationDescriptionOfTiming"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_747b92c9-8dfb-438a-8633-83c4c7e721c2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_566e14e3-2758-48a3-853c-076f5330f420" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3c5ea5c4-5167-45d2-a3c3-d048d3ccaad8" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_566e14e3-2758-48a3-853c-076f5330f420" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_566e14e3-2758-48a3-853c-076f5330f420" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e" xlink:to="loc_us-gaap_SegmentDomain_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_bbae82d6-7ef3-459c-8bbd-2fc297d05c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_69efd4d0-a0aa-42f1-a05e-133faa9a6a2e" xlink:to="loc_us-gaap_SegmentDomain_bbae82d6-7ef3-459c-8bbd-2fc297d05c7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_HousekeepingServicesMember_3d622cf4-e729-4229-b553-567d16cf30c7" xlink:href="hcsg-20211231.xsd#hcsg_HousekeepingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bbae82d6-7ef3-459c-8bbd-2fc297d05c7b" xlink:to="loc_hcsg_HousekeepingServicesMember_3d622cf4-e729-4229-b553-567d16cf30c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DietaryServicesMember_3f8a4b68-e1dc-49da-a4de-aa8912a86ec0" xlink:href="hcsg-20211231.xsd#hcsg_DietaryServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bbae82d6-7ef3-459c-8bbd-2fc297d05c7b" xlink:to="loc_hcsg_DietaryServicesMember_3f8a4b68-e1dc-49da-a4de-aa8912a86ec0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5b0b7a09-bc0a-45e7-af9a-a179dd67654d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_566e14e3-2758-48a3-853c-076f5330f420" xlink:to="loc_srt_RangeAxis_5b0b7a09-bc0a-45e7-af9a-a179dd67654d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5b0b7a09-bc0a-45e7-af9a-a179dd67654d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5b0b7a09-bc0a-45e7-af9a-a179dd67654d" xlink:to="loc_srt_RangeMember_5b0b7a09-bc0a-45e7-af9a-a179dd67654d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_557c6079-665e-4d5b-8b08-155ca8dd2930" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5b0b7a09-bc0a-45e7-af9a-a179dd67654d" xlink:to="loc_srt_RangeMember_557c6079-665e-4d5b-8b08-155ca8dd2930" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_11c61056-8d90-493e-bda5-aa73aa4fbdb5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_557c6079-665e-4d5b-8b08-155ca8dd2930" xlink:to="loc_srt_MinimumMember_11c61056-8d90-493e-bda5-aa73aa4fbdb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_adbdb191-0742-4d3b-bcfc-28fd6a25327c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_557c6079-665e-4d5b-8b08-155ca8dd2930" xlink:to="loc_srt_MaximumMember_adbdb191-0742-4d3b-bcfc-28fd6a25327c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_7cbee65f-280e-4ec7-bcaa-02ac73243df8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_566e14e3-2758-48a3-853c-076f5330f420" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_7cbee65f-280e-4ec7-bcaa-02ac73243df8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_7cbee65f-280e-4ec7-bcaa-02ac73243df8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_7cbee65f-280e-4ec7-bcaa-02ac73243df8" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_7cbee65f-280e-4ec7-bcaa-02ac73243df8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_06dcdd08-ee50-4d0e-9f17-434ef157579d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_7cbee65f-280e-4ec7-bcaa-02ac73243df8" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_06dcdd08-ee50-4d0e-9f17-434ef157579d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_3a24c740-f7eb-4162-bb36-e36ffd234a6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_06dcdd08-ee50-4d0e-9f17-434ef157579d" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_3a24c740-f7eb-4162-bb36-e36ffd234a6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_b63e703a-ab5c-46c8-b5d9-173ed52931c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_06dcdd08-ee50-4d0e-9f17-434ef157579d" xlink:to="loc_us-gaap_TransferredOverTimeMember_b63e703a-ab5c-46c8-b5d9-173ed52931c9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails" xlink:type="extended" id="i855a067409814d788c6ad6f9688b8058_RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_66798c06-c10f-4b31-8c68-c0894956d04f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_66798c06-c10f-4b31-8c68-c0894956d04f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_3c80b220-9582-4c53-8e5a-412986810419" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_3c80b220-9582-4c53-8e5a-412986810419" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_f90a0c0f-6328-4a49-ab19-b651c36746b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_f90a0c0f-6328-4a49-ab19-b651c36746b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_8964ffab-facf-4b7f-8e2f-4c772005a780" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_8964ffab-facf-4b7f-8e2f-4c772005a780" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_5509aa0f-30e5-4799-be3a-769c7708598f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_8964ffab-facf-4b7f-8e2f-4c772005a780" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_5509aa0f-30e5-4799-be3a-769c7708598f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails_1" xlink:type="simple" xlink:href="hcsg-20211231.xsd#RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails_1"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails_1" xlink:type="extended" id="ia1701090448a4612afaae2c4a62d4d82_RevenueTransactionPriceAllocatedtoRemainingPerformanceObligationDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_66798c06-c10f-4b31-8c68-c0894956d04f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_66798c06-c10f-4b31-8c68-c0894956d04f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_3c80b220-9582-4c53-8e5a-412986810419" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_3c80b220-9582-4c53-8e5a-412986810419" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_f90a0c0f-6328-4a49-ab19-b651c36746b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_f90a0c0f-6328-4a49-ab19-b651c36746b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_8964ffab-facf-4b7f-8e2f-4c772005a780" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_8b9bb605-632f-475b-a591-11bb1635e91d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_8964ffab-facf-4b7f-8e2f-4c772005a780" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails" xlink:type="extended" id="i0ae70dc1c9284f638c1fc6e3b2dd615b_ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_612eae63-6827-44cc-8e69-8afc5f648dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:to="loc_us-gaap_StockholdersEquity_612eae63-6827-44cc-8e69-8afc5f648dfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_137e4416-6ba4-4ea2-a439-caacd05449e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_137e4416-6ba4-4ea2-a439-caacd05449e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_111296c1-e611-48f7-861a-54a2ca4a579e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_111296c1-e611-48f7-861a-54a2ca4a579e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32301c79-def3-43be-a079-44fd5ed5ed3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_5d1a6037-d2c1-4019-9d0b-f31265fa37b1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32301c79-def3-43be-a079-44fd5ed5ed3f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ebe0a901-cff0-4bb9-b2c0-c106fb3e4574" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_769af086-80b3-4540-84e4-999cc1b812df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_769af086-80b3-4540-84e4-999cc1b812df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_d4bb6411-d8d7-4ff2-b435-8f01700ef452" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_d4bb6411-d8d7-4ff2-b435-8f01700ef452" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_9a3a62a7-2b45-4ef1-877c-08d1cccc2f8a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_9a3a62a7-2b45-4ef1-877c-08d1cccc2f8a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_73186b89-7962-4c7b-94e2-4ac1d7ca8592" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_68eb724f-0970-4919-92ce-b1475d9ba745" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_73186b89-7962-4c7b-94e2-4ac1d7ca8592" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_4e6a8318-db10-40d4-b9b6-79cf77a134ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_73186b89-7962-4c7b-94e2-4ac1d7ca8592" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_4e6a8318-db10-40d4-b9b6-79cf77a134ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_4e6a8318-db10-40d4-b9b6-79cf77a134ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4e6a8318-db10-40d4-b9b6-79cf77a134ad" xlink:to="loc_us-gaap_EquityComponentDomain_4e6a8318-db10-40d4-b9b6-79cf77a134ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_48709117-dfe1-4125-9a71-1e985cf3a1a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4e6a8318-db10-40d4-b9b6-79cf77a134ad" xlink:to="loc_us-gaap_EquityComponentDomain_48709117-dfe1-4125-9a71-1e985cf3a1a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_24e6465d-fd18-45fa-8f11-0f8969ce8a40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_48709117-dfe1-4125-9a71-1e985cf3a1a4" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_24e6465d-fd18-45fa-8f11-0f8969ce8a40" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails" xlink:type="extended" id="iebb4cd0048c64199a8d21fa459ef07d8_ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_80e762ba-1057-4578-8d6a-9d50767533e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesGainLossExcludingOtti_66d7f15a-472c-4ae4-a9e4-2b05b68bef0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtSecuritiesGainLossExcludingOtti"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_80e762ba-1057-4578-8d6a-9d50767533e7" xlink:to="loc_us-gaap_DebtSecuritiesGainLossExcludingOtti_66d7f15a-472c-4ae4-a9e4-2b05b68bef0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_3321579b-8615-411d-9de0-c775a9e651f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_80e762ba-1057-4578-8d6a-9d50767533e7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_3321579b-8615-411d-9de0-c775a9e651f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_aba062d8-73a0-4904-a76e-458ce9d5a091" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_80e762ba-1057-4578-8d6a-9d50767533e7" xlink:to="loc_us-gaap_NetIncomeLoss_aba062d8-73a0-4904-a76e-458ce9d5a091" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_61369d83-092c-45b9-95f4-4426acbd4148" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_80e762ba-1057-4578-8d6a-9d50767533e7" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_61369d83-092c-45b9-95f4-4426acbd4148" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e2b3673b-2408-4718-9249-aca94a24c4f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_61369d83-092c-45b9-95f4-4426acbd4148" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e2b3673b-2408-4718-9249-aca94a24c4f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e2b3673b-2408-4718-9249-aca94a24c4f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2b3673b-2408-4718-9249-aca94a24c4f9" xlink:to="loc_us-gaap_EquityComponentDomain_e2b3673b-2408-4718-9249-aca94a24c4f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e101dec9-9351-49a0-ad06-32c0d606141b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2b3673b-2408-4718-9249-aca94a24c4f9" xlink:to="loc_us-gaap_EquityComponentDomain_e101dec9-9351-49a0-ad06-32c0d606141b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_c9921967-84fe-4f9b-85d4-b781c9c08380" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e101dec9-9351-49a0-ad06-32c0d606141b" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_c9921967-84fe-4f9b-85d4-b781c9c08380" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_61369d83-092c-45b9-95f4-4426acbd4148" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_aa4dc685-5520-41d3-b0fb-84975442103b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_d52ee71b-2ddc-4a87-805e-d7ec5fb8260c" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_aa4dc685-5520-41d3-b0fb-84975442103b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_5f83705a-108c-44ff-8d79-1ed1bc991f42" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_aa4dc685-5520-41d3-b0fb-84975442103b" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_5f83705a-108c-44ff-8d79-1ed1bc991f42" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#PropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/PropertyandEquipmentDetails" xlink:type="extended" id="if00918ba1e254e7b8c2393508ec192ca_PropertyandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_a1953b02-4e55-4590-9d80-332c76a716eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_a1953b02-4e55-4590-9d80-332c76a716eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_57400797-36ea-4dcf-8b8c-555818990682" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_57400797-36ea-4dcf-8b8c-555818990682" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_02f7d0b4-553a-4012-b39f-beb6191f9156" xlink:href="hcsg-20211231.xsd#hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_02f7d0b4-553a-4012-b39f-beb6191f9156" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_a665eec6-e1e5-4045-a08d-6e37ee124fb4" xlink:href="hcsg-20211231.xsd#hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_a665eec6-e1e5-4045-a08d-6e37ee124fb4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_86f4e5da-6ba7-46fd-ac35-0bd932591636" xlink:href="hcsg-20211231.xsd#hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_86f4e5da-6ba7-46fd-ac35-0bd932591636" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_a3393a6b-3b8b-414e-8c9c-099a257a7b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_us-gaap_Depreciation_a3393a6b-3b8b-414e-8c9c-099a257a7b1b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_7e0c831e-4454-40a0-8cb0-e33d74bc7d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_7e0c831e-4454-40a0-8cb0-e33d74bc7d2e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5f96961d-6d71-44ff-902c-fbef1fe82827" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1d7ccd4e-40a7-4c9c-8d2c-455f81772f88" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5f96961d-6d71-44ff-902c-fbef1fe82827" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_e168e6a0-570d-4cda-8457-12543f62e7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5f96961d-6d71-44ff-902c-fbef1fe82827" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_e168e6a0-570d-4cda-8457-12543f62e7f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e168e6a0-570d-4cda-8457-12543f62e7f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_e168e6a0-570d-4cda-8457-12543f62e7f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e168e6a0-570d-4cda-8457-12543f62e7f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a35be77c-7743-4cd6-a997-6fdc5b1afd0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_e168e6a0-570d-4cda-8457-12543f62e7f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a35be77c-7743-4cd6-a997-6fdc5b1afd0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_HousekeepingAndDietaryEquipmentMember_1888f665-ce6f-4f7a-b5ee-abb3843223a2" xlink:href="hcsg-20211231.xsd#hcsg_HousekeepingAndDietaryEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a35be77c-7743-4cd6-a997-6fdc5b1afd0a" xlink:to="loc_hcsg_HousekeepingAndDietaryEquipmentMember_1888f665-ce6f-4f7a-b5ee-abb3843223a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ComputerHardwareAndSoftwareMember_373a261a-767f-41f2-9d10-5c05511ec48f" xlink:href="hcsg-20211231.xsd#hcsg_ComputerHardwareAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a35be77c-7743-4cd6-a997-6fdc5b1afd0a" xlink:to="loc_hcsg_ComputerHardwareAndSoftwareMember_373a261a-767f-41f2-9d10-5c05511ec48f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_cfaf2e8e-b6c1-4ce1-9b31-16ada5124c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a35be77c-7743-4cd6-a997-6fdc5b1afd0a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_cfaf2e8e-b6c1-4ce1-9b31-16ada5124c7e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#GoodwillandOtherIntangibleAssetsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsAdditionalInformationDetails" xlink:type="extended" id="i000cc326788c43e4b00acef036b4edf6_GoodwillandOtherIntangibleAssetsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e0bb96b5-31e3-4616-a10d-4b24a531094f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e0bb96b5-31e3-4616-a10d-4b24a531094f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_65a322c8-a6a3-4dc5-96e9-efb1a847d8e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_65a322c8-a6a3-4dc5-96e9-efb1a847d8e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_f8f3c5e5-97d9-41f5-b3cc-fe60fdc6907f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_f8f3c5e5-97d9-41f5-b3cc-fe60fdc6907f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_f6afa6a2-4ef9-402c-a083-9fae1976dab8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_f6afa6a2-4ef9-402c-a083-9fae1976dab8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7e4abb8c-36c5-4dd9-b189-c53fc7f30d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_e8d87bde-b25b-463e-8278-2a3f40ec5eb7" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7e4abb8c-36c5-4dd9-b189-c53fc7f30d0b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_bc39a1f0-9652-4583-abfb-59dc4084e373" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7e4abb8c-36c5-4dd9-b189-c53fc7f30d0b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_bc39a1f0-9652-4583-abfb-59dc4084e373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_bc39a1f0-9652-4583-abfb-59dc4084e373_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_bc39a1f0-9652-4583-abfb-59dc4084e373" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_bc39a1f0-9652-4583-abfb-59dc4084e373_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_bc39a1f0-9652-4583-abfb-59dc4084e373" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_daa52968-2028-4ed6-9eb0-cff4a216d33e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:to="loc_us-gaap_CustomerRelationshipsMember_daa52968-2028-4ed6-9eb0-cff4a216d33e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_99fabe55-3880-4f43-89fc-09e473dcf6b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:to="loc_us-gaap_TradeNamesMember_99fabe55-3880-4f43-89fc-09e473dcf6b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_78232e7c-dacd-4952-8e75-6d1437efcd2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:to="loc_us-gaap_PatentsMember_78232e7c-dacd-4952-8e75-6d1437efcd2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_38ef28bd-3c0d-44d5-8175-ba0ca118de44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa824568-1fd1-4392-ac7d-e61bd2fa37e4" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_38ef28bd-3c0d-44d5-8175-ba0ca118de44" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsGoodwillbyReportableSegmentDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#GoodwillandOtherIntangibleAssetsGoodwillbyReportableSegmentDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsGoodwillbyReportableSegmentDetails" xlink:type="extended" id="i59500243743446148d116c637e3f48ee_GoodwillandOtherIntangibleAssetsGoodwillbyReportableSegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_c1d23897-ae76-4a47-81b4-0fd47b5f0ba7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_57af33e1-43a1-4611-8df6-0c338c8bc594" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_c1d23897-ae76-4a47-81b4-0fd47b5f0ba7" xlink:to="loc_us-gaap_GoodwillRollForward_57af33e1-43a1-4611-8df6-0c338c8bc594" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_d016ed82-02ab-476a-b5aa-f4a94e8210da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_57af33e1-43a1-4611-8df6-0c338c8bc594" xlink:to="loc_us-gaap_Goodwill_d016ed82-02ab-476a-b5aa-f4a94e8210da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_a084c71b-dc1a-4687-bddf-bee66f1420e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_57af33e1-43a1-4611-8df6-0c338c8bc594" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_a084c71b-dc1a-4687-bddf-bee66f1420e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_e642b714-932d-46c8-9d96-1ce71e28b79b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_cbab7c97-e1fd-4081-aae6-c34fbf86683b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_c1d23897-ae76-4a47-81b4-0fd47b5f0ba7" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_cbab7c97-e1fd-4081-aae6-c34fbf86683b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_9513ae5b-2d03-4651-b3a8-a04c63768ec3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_c1d23897-ae76-4a47-81b4-0fd47b5f0ba7" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_9513ae5b-2d03-4651-b3a8-a04c63768ec3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_2285c871-0f49-45d6-9f75-e479ee42c4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_c1d23897-ae76-4a47-81b4-0fd47b5f0ba7" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_2285c871-0f49-45d6-9f75-e479ee42c4b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_2285c871-0f49-45d6-9f75-e479ee42c4b8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42" xlink:to="loc_us-gaap_SegmentDomain_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_eb0b8ec6-2cc2-49e2-a6d2-fb31a7a8835f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cab3ac0a-32d4-4ec4-b1a5-e5aebfa97b42" xlink:to="loc_us-gaap_SegmentDomain_eb0b8ec6-2cc2-49e2-a6d2-fb31a7a8835f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_HousekeepingServicesMember_a80cc831-26bc-46a2-ad24-74b45fb8b2af" xlink:href="hcsg-20211231.xsd#hcsg_HousekeepingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_eb0b8ec6-2cc2-49e2-a6d2-fb31a7a8835f" xlink:to="loc_hcsg_HousekeepingServicesMember_a80cc831-26bc-46a2-ad24-74b45fb8b2af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DietaryServicesMember_41749593-8491-4360-9d15-473eed5be715" xlink:href="hcsg-20211231.xsd#hcsg_DietaryServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_eb0b8ec6-2cc2-49e2-a6d2-fb31a7a8835f" xlink:to="loc_hcsg_DietaryServicesMember_41749593-8491-4360-9d15-473eed5be715" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_9b840f9e-455f-4f4d-ad2e-77810b5b4a42" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_2285c871-0f49-45d6-9f75-e479ee42c4b8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_9b840f9e-455f-4f4d-ad2e-77810b5b4a42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9b840f9e-455f-4f4d-ad2e-77810b5b4a42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9b840f9e-455f-4f4d-ad2e-77810b5b4a42" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9b840f9e-455f-4f4d-ad2e-77810b5b4a42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43169fd0-4dfb-4542-a5ec-0671c22f99c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9b840f9e-455f-4f4d-ad2e-77810b5b4a42" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43169fd0-4dfb-4542-a5ec-0671c22f99c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ManufacturerOfPrepackagedMealsMember_fc6f08a7-6f18-4f6c-8aef-c5bc0652dd7f" xlink:href="hcsg-20211231.xsd#hcsg_ManufacturerOfPrepackagedMealsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43169fd0-4dfb-4542-a5ec-0671c22f99c6" xlink:to="loc_hcsg_ManufacturerOfPrepackagedMealsMember_fc6f08a7-6f18-4f6c-8aef-c5bc0652dd7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RegionalDiningOperatorMember_fdb1517e-d47d-45bc-8ce1-2e8b1a5b9bb1" xlink:href="hcsg-20211231.xsd#hcsg_RegionalDiningOperatorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43169fd0-4dfb-4542-a5ec-0671c22f99c6" xlink:to="loc_hcsg_RegionalDiningOperatorMember_fdb1517e-d47d-45bc-8ce1-2e8b1a5b9bb1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="extended" id="i3b0dc65023924eeea5184be00a6a4a7a_GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_11a58d78-9d6c-48c8-8ace-6f393d2fabfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_012b64ed-95c1-4a7d-9a3c-d32f37f38514" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_11a58d78-9d6c-48c8-8ace-6f393d2fabfb" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_012b64ed-95c1-4a7d-9a3c-d32f37f38514" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_9ee6c532-6182-4b89-909f-cb2e4bd700f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_11a58d78-9d6c-48c8-8ace-6f393d2fabfb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_9ee6c532-6182-4b89-909f-cb2e4bd700f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_2b19caca-dece-47f1-8774-a4a0c6b57e70" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_11a58d78-9d6c-48c8-8ace-6f393d2fabfb" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_2b19caca-dece-47f1-8774-a4a0c6b57e70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_afb7e824-9937-49d2-8f8a-fb0cfc62d98f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_11a58d78-9d6c-48c8-8ace-6f393d2fabfb" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_afb7e824-9937-49d2-8f8a-fb0cfc62d98f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eaa75e9-3053-4eb7-ab06-e937ed646a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_afb7e824-9937-49d2-8f8a-fb0cfc62d98f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eaa75e9-3053-4eb7-ab06-e937ed646a5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eaa75e9-3053-4eb7-ab06-e937ed646a5c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eaa75e9-3053-4eb7-ab06-e937ed646a5c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eaa75e9-3053-4eb7-ab06-e937ed646a5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eaa75e9-3053-4eb7-ab06-e937ed646a5c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_7a5ae30f-0574-478a-abfe-9ceb8f507b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:to="loc_us-gaap_CustomerRelationshipsMember_7a5ae30f-0574-478a-abfe-9ceb8f507b6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_5b27f112-5efc-47e0-ac79-f1a146e80fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:to="loc_us-gaap_TradeNamesMember_5b27f112-5efc-47e0-ac79-f1a146e80fbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_6b69262e-756b-4852-a3a4-f14c1b7d54b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:to="loc_us-gaap_PatentsMember_6b69262e-756b-4852-a3a4-f14c1b7d54b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_bdf6d67f-18bf-44c7-81b9-969e39747ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1dd9b356-6650-490e-8c08-6b8a4517ed3d" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_bdf6d67f-18bf-44c7-81b9-969e39747ac7" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#FairValueMeasurementsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsAdditionalInformationDetails" xlink:type="extended" id="i7272ec8e0a9c46cdb7889b10ec6ce4e0_FairValueMeasurementsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6049647a-1927-42b2-8074-f39c24ca94e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_b3499095-d129-4d45-b19a-7970e57ef4ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6049647a-1927-42b2-8074-f39c24ca94e8" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_b3499095-d129-4d45-b19a-7970e57ef4ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_d683b7ce-b234-4dee-8f9d-1c048a3a2113" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6049647a-1927-42b2-8074-f39c24ca94e8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_d683b7ce-b234-4dee-8f9d-1c048a3a2113" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_dfa256db-6216-4b53-a211-e0dd67c6f190" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6049647a-1927-42b2-8074-f39c24ca94e8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_dfa256db-6216-4b53-a211-e0dd67c6f190" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b342d67f-ee18-4f69-a4bf-1ecc9d627c63" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6049647a-1927-42b2-8074-f39c24ca94e8" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b342d67f-ee18-4f69-a4bf-1ecc9d627c63" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_8b7412bc-5052-4e2b-ab89-5f105f2395cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b342d67f-ee18-4f69-a4bf-1ecc9d627c63" xlink:to="loc_us-gaap_InvestmentTypeAxis_8b7412bc-5052-4e2b-ab89-5f105f2395cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_8b7412bc-5052-4e2b-ab89-5f105f2395cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_8b7412bc-5052-4e2b-ab89-5f105f2395cd" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_8b7412bc-5052-4e2b-ab89-5f105f2395cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_daddb9ea-5ded-42a8-810e-df2435f47361" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_8b7412bc-5052-4e2b-ab89-5f105f2395cd" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_daddb9ea-5ded-42a8-810e-df2435f47361" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_b0702283-4253-4270-8eb2-c3e6768cc9ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_daddb9ea-5ded-42a8-810e-df2435f47361" xlink:to="loc_us-gaap_MunicipalBondsMember_b0702283-4253-4270-8eb2-c3e6768cc9ea" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails" xlink:type="extended" id="if9b085322f7649439913417d2a17ba4e_FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_b6a046e3-f29d-4e7e-9ffd-93177456295d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_ee209add-a25f-4ba0-882b-0f6cdd6eb911" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_b6a046e3-f29d-4e7e-9ffd-93177456295d" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_ee209add-a25f-4ba0-882b-0f6cdd6eb911" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_14724a16-3039-4293-9b97-bd2e92a383f1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_b6a046e3-f29d-4e7e-9ffd-93177456295d" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_14724a16-3039-4293-9b97-bd2e92a383f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationPlanAssetsPrepaid_fd128490-3fb9-47fe-89bf-6c1d48152233" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationPlanAssetsPrepaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_b6a046e3-f29d-4e7e-9ffd-93177456295d" xlink:to="loc_hcsg_DeferredCompensationPlanAssetsPrepaid_fd128490-3fb9-47fe-89bf-6c1d48152233" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_789ad5ef-df05-49bb-8ebe-7925469428df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_b6a046e3-f29d-4e7e-9ffd-93177456295d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_789ad5ef-df05-49bb-8ebe-7925469428df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_cf5f6ee7-30a2-4610-b840-822f93832a04" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_789ad5ef-df05-49bb-8ebe-7925469428df" xlink:to="loc_us-gaap_InvestmentTypeAxis_cf5f6ee7-30a2-4610-b840-822f93832a04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_cf5f6ee7-30a2-4610-b840-822f93832a04_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_cf5f6ee7-30a2-4610-b840-822f93832a04" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_cf5f6ee7-30a2-4610-b840-822f93832a04_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_cf5f6ee7-30a2-4610-b840-822f93832a04" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_281ce36e-e721-411b-87b5-6de07e30bb84" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_us-gaap_MunicipalBondsMember_281ce36e-e721-411b-87b5-6de07e30bb84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_563d67ed-53d7-471b-bfb5-a5ddb74cb1d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_us-gaap_MoneyMarketFundsMember_563d67ed-53d7-471b-bfb5-a5ddb74cb1d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_BalancedAndLifestyleMember_97584a90-a520-475a-a990-eef3657811c8" xlink:href="hcsg-20211231.xsd#hcsg_BalancedAndLifestyleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_hcsg_BalancedAndLifestyleMember_97584a90-a520-475a-a990-eef3657811c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_LargeCapGrowthMember_3b71cf3a-a226-4902-9499-e08a4ba1909d" xlink:href="hcsg-20211231.xsd#hcsg_LargeCapGrowthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_hcsg_LargeCapGrowthMember_3b71cf3a-a226-4902-9499-e08a4ba1909d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_SmallCapGrowthMember_043b88d5-4966-4f97-ae2a-96b460cbee6b" xlink:href="hcsg-20211231.xsd#hcsg_SmallCapGrowthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_hcsg_SmallCapGrowthMember_043b88d5-4966-4f97-ae2a-96b460cbee6b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeInvestmentsMember_9eb78a4f-93bc-40ef-a1d0-5c87556484a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_us-gaap_FixedIncomeInvestmentsMember_9eb78a4f-93bc-40ef-a1d0-5c87556484a1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_InternationalMember_309bfff4-d742-4a2f-ac81-5f571948fd64" xlink:href="hcsg-20211231.xsd#hcsg_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_hcsg_InternationalMember_309bfff4-d742-4a2f-ac81-5f571948fd64" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_MidCapGrowthMember_a7b3172c-a9d2-47c2-a114-3b13566fd053" xlink:href="hcsg-20211231.xsd#hcsg_MidCapGrowthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fe0c1d90-2457-47b0-819d-6f1242ea5ce4" xlink:to="loc_hcsg_MidCapGrowthMember_a7b3172c-a9d2-47c2-a114-3b13566fd053" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_b2533c7f-6289-432f-85ad-8601465ba65e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_789ad5ef-df05-49bb-8ebe-7925469428df" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_b2533c7f-6289-432f-85ad-8601465ba65e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b2533c7f-6289-432f-85ad-8601465ba65e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_b2533c7f-6289-432f-85ad-8601465ba65e" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b2533c7f-6289-432f-85ad-8601465ba65e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0bae7056-fd1e-4e71-942b-a018bb571a5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_b2533c7f-6289-432f-85ad-8601465ba65e" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0bae7056-fd1e-4e71-942b-a018bb571a5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bbb948c1-0d7f-481a-876e-97202b1d755e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0bae7056-fd1e-4e71-942b-a018bb571a5f" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bbb948c1-0d7f-481a-876e-97202b1d755e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_491ff02d-24cc-4b4c-b8f4-5b959e34c18b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bbb948c1-0d7f-481a-876e-97202b1d755e" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_491ff02d-24cc-4b4c-b8f4-5b959e34c18b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_172d9fa9-ba22-4fe6-9ec2-a9b9ab1d1f95" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bbb948c1-0d7f-481a-876e-97202b1d755e" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_172d9fa9-ba22-4fe6-9ec2-a9b9ab1d1f95" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_11b5f76e-e266-4251-a818-14bd31ade8cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_789ad5ef-df05-49bb-8ebe-7925469428df" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_11b5f76e-e266-4251-a818-14bd31ade8cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11b5f76e-e266-4251-a818-14bd31ade8cb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_11b5f76e-e266-4251-a818-14bd31ade8cb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11b5f76e-e266-4251-a818-14bd31ade8cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cccdbd14-3722-4e72-bfc8-a2e165980f12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_11b5f76e-e266-4251-a818-14bd31ade8cb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cccdbd14-3722-4e72-bfc8-a2e165980f12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_d0acb2f3-cd32-4a0b-95ca-c95ffc1e4ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cccdbd14-3722-4e72-bfc8-a2e165980f12" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_d0acb2f3-cd32-4a0b-95ca-c95ffc1e4ff4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_e3e1f44b-21bc-4c5b-a9b7-58132a779e32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cccdbd14-3722-4e72-bfc8-a2e165980f12" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_e3e1f44b-21bc-4c5b-a9b7-58132a779e32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_299e4871-f5b8-4e7e-b056-3423f4440d67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cccdbd14-3722-4e72-bfc8-a2e165980f12" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_299e4871-f5b8-4e7e-b056-3423f4440d67" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsMarketableDebtSecuritiesDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#FairValueMeasurementsMarketableDebtSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsMarketableDebtSecuritiesDetails" xlink:type="extended" id="i5fb742a60d9246ba960b0553f30906f2_FairValueMeasurementsMarketableDebtSecuritiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_78c9291f-55a0-40d5-83b0-fe02e4c09c52" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_78c9291f-55a0-40d5-83b0-fe02e4c09c52" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_1c537ea8-e0a4-4778-b263-44560c573872" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_1c537ea8-e0a4-4778-b263-44560c573872" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c0cd4fd5-c1e9-4d40-80a0-f807d50519c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c0cd4fd5-c1e9-4d40-80a0-f807d50519c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_d306227d-2992-4e5f-b0e1-beb6869c4cc3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_d306227d-2992-4e5f-b0e1-beb6869c4cc3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfInvestments_cc0a6c29-96b8-4e0b-9b27-9578d225f9db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_ImpairmentOfInvestments_cc0a6c29-96b8-4e0b-9b27-9578d225f9db" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_7f4075db-b96a-4f82-a8f4-7dcbc6ced515" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_c1217296-1788-4f8b-ab71-aa7b312a92a8" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_7f4075db-b96a-4f82-a8f4-7dcbc6ced515" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_d00ec0b6-308c-40c8-83d9-a5a15f27518f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_7f4075db-b96a-4f82-a8f4-7dcbc6ced515" xlink:to="loc_us-gaap_InvestmentTypeAxis_d00ec0b6-308c-40c8-83d9-a5a15f27518f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_d00ec0b6-308c-40c8-83d9-a5a15f27518f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_d00ec0b6-308c-40c8-83d9-a5a15f27518f" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_d00ec0b6-308c-40c8-83d9-a5a15f27518f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_591ba0b9-656d-47fd-a287-c93bfd5e3072" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_d00ec0b6-308c-40c8-83d9-a5a15f27518f" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_591ba0b9-656d-47fd-a287-c93bfd5e3072" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_a6a5774b-72a1-42b7-a6ff-d4040c21d471" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_591ba0b9-656d-47fd-a287-c93bfd5e3072" xlink:to="loc_us-gaap_MunicipalBondsMember_a6a5774b-72a1-42b7-a6ff-d4040c21d471" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#AllowanceforDoubtfulAccountsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAdditionalInformationDetails" xlink:type="extended" id="id4e8498977bc4782a1b7ad400ec5f0a8_AllowanceforDoubtfulAccountsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_efda52a4-98e2-40e6-b12c-cac62b02eb8d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_1e812219-716f-4fd1-9764-1493e15aedc8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_efda52a4-98e2-40e6-b12c-cac62b02eb8d" xlink:to="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_1e812219-716f-4fd1-9764-1493e15aedc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_021bd209-4e0e-4c48-a930-36805ba43462" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableNonaccrualInterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_efda52a4-98e2-40e6-b12c-cac62b02eb8d" xlink:to="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_021bd209-4e0e-4c48-a930-36805ba43462" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal_7ff42112-5b45-4bb9-96cb-286aebc12c18" xlink:href="hcsg-20211231.xsd#hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_efda52a4-98e2-40e6-b12c-cac62b02eb8d" xlink:to="loc_hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal_7ff42112-5b45-4bb9-96cb-286aebc12c18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_296c0e7c-dbde-47d2-923a-1a7b96b0a5fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_efda52a4-98e2-40e6-b12c-cac62b02eb8d" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_296c0e7c-dbde-47d2-923a-1a7b96b0a5fa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8de01eef-e4f4-48a1-9793-a593d7a2c391" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_296c0e7c-dbde-47d2-923a-1a7b96b0a5fa" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8de01eef-e4f4-48a1-9793-a593d7a2c391" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8de01eef-e4f4-48a1-9793-a593d7a2c391_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8de01eef-e4f4-48a1-9793-a593d7a2c391" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8de01eef-e4f4-48a1-9793-a593d7a2c391_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_fad5f741-26ff-42d3-ab81-5d6bade23164" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8de01eef-e4f4-48a1-9793-a593d7a2c391" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_fad5f741-26ff-42d3-ab81-5d6bade23164" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_063a8213-ce78-4573-9101-8a392ab5e9d8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_fad5f741-26ff-42d3-ab81-5d6bade23164" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_063a8213-ce78-4573-9101-8a392ab5e9d8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsNotesReceivableDisaggregatedbyVintageYearDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#AllowanceforDoubtfulAccountsNotesReceivableDisaggregatedbyVintageYearDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsNotesReceivableDisaggregatedbyVintageYearDetails" xlink:type="extended" id="i408d1d614bb74898b59329d8225d01ce_AllowanceforDoubtfulAccountsNotesReceivableDisaggregatedbyVintageYearDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_3f2b28f5-1821-4e25-8c2b-e8b4ed0453f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_3f2b28f5-1821-4e25-8c2b-e8b4ed0453f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_3a8a4133-4e87-448a-9072-80403dc54bde" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_3a8a4133-4e87-448a-9072-80403dc54bde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_5a8f9e66-da49-4fb2-b429-93e2cadb0ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_5a8f9e66-da49-4fb2-b429-93e2cadb0ff8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_03fca020-b483-4d46-8bf2-0c5c2f3ee283" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_03fca020-b483-4d46-8bf2-0c5c2f3ee283" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_96abb7a9-9390-4d14-945a-4d777171f844" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_96abb7a9-9390-4d14-945a-4d777171f844" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_236c85c8-c8c3-402e-bf9a-9466604a86e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_236c85c8-c8c3-402e-bf9a-9466604a86e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_64eaf254-c763-4d85-a585-7f7e4a538a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_NotesReceivableGross_64eaf254-c763-4d85-a585-7f7e4a538a9f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearOneOriginatedCurrentFiscalYear_edff23ae-6b47-4981-a750-d3afc601cac8" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearOneOriginatedCurrentFiscalYear_edff23ae-6b47-4981-a750-d3afc601cac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_d85f8d72-26f3-45ac-ac39-071ffdaaa446" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_d85f8d72-26f3-45ac-ac39-071ffdaaa446" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_8a5f37e4-875b-410f-8f7b-d52f2d919118" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_8a5f37e4-875b-410f-8f7b-d52f2d919118" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_5cacc70a-3e09-4062-aada-f2b458725cea" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_5cacc70a-3e09-4062-aada-f2b458725cea" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_8f56b45e-b9d1-47df-9e2e-fe81b6a1067d" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_8f56b45e-b9d1-47df-9e2e-fe81b6a1067d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_97c4ba80-639d-49dd-b3ec-e69c7ab47085" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_97c4ba80-639d-49dd-b3ec-e69c7ab47085" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_4eb5f9c4-4592-4d15-9c2f-356b246ff9f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAbstract_6e95fa15-a58c-481f-95da-15ba8298cfc4" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_4eb5f9c4-4592-4d15-9c2f-356b246ff9f2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearOneOriginatedCurrentFiscalYear_55af53b9-a643-4cfa-aa63-28c491c116e2" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearOneOriginatedCurrentFiscalYear_55af53b9-a643-4cfa-aa63-28c491c116e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_891cf667-7b73-4256-886f-d887158881e6" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_891cf667-7b73-4256-886f-d887158881e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_38066ad2-46bd-4094-a15a-44e7a7045f3c" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_38066ad2-46bd-4094-a15a-44e7a7045f3c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_e5b6de73-4d10-41e5-8a8f-b560a25f9367" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_e5b6de73-4d10-41e5-8a8f-b560a25f9367" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_95fce950-aa03-44a9-82d4-7c5ca5fd5891" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_95fce950-aa03-44a9-82d4-7c5ca5fd5891" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_ca2ae7d9-bf56-4453-8b05-90b6e0f2b1b5" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_ca2ae7d9-bf56-4453-8b05-90b6e0f2b1b5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_fab851f2-d808-4d88-92f8-832959264627" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_hcsg_FinancingReceivableAllowanceForCreditLossRecoveryAbstract_28de1dd1-a294-4a85-9d82-10e77995672d" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_fab851f2-d808-4d88-92f8-832959264627" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearOneOriginatedCurrentFiscalYear_55873278-9911-43fc-9645-8021dbd07e53" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearOneOriginatedCurrentFiscalYear_55873278-9911-43fc-9645-8021dbd07e53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_7c95691b-18f4-4d3b-bd94-4822e0670955" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_7c95691b-18f4-4d3b-bd94-4822e0670955" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_20c06922-aac2-40e4-b755-02bd3539be03" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_20c06922-aac2-40e4-b755-02bd3539be03" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_d974492c-6975-4521-b4f7-9ad822d4f3fa" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_d974492c-6975-4521-b4f7-9ad822d4f3fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_ec2f4b08-f695-45ff-ac0f-6ab7ee523fcb" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_ec2f4b08-f695-45ff-ac0f-6ab7ee523fcb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_042cfde6-f624-4bad-82dd-1691e00be744" xlink:href="hcsg-20211231.xsd#hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_hcsg_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_042cfde6-f624-4bad-82dd-1691e00be744" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_06250664-ca88-4aad-89b8-192edb6fed86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNetAbstract_4af43e5c-b65d-4657-b679-6c83ada55696" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_06250664-ca88-4aad-89b8-192edb6fed86" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_087d2bcc-3c08-4edd-a5a2-ce329a14cdab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_98fe5b54-5064-4d83-a344-66067fba029f" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_087d2bcc-3c08-4edd-a5a2-ce329a14cdab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_087d2bcc-3c08-4edd-a5a2-ce329a14cdab" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d92980b9-f448-4916-b514-14844ef76d92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd27ea5c-f31c-4904-bc4d-b1dfcd52f3a6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d92980b9-f448-4916-b514-14844ef76d92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_StandardNoteReceivableMember_53f92df7-4712-4bf7-880a-80c1afd22e27" xlink:href="hcsg-20211231.xsd#hcsg_StandardNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d92980b9-f448-4916-b514-14844ef76d92" xlink:to="loc_hcsg_StandardNoteReceivableMember_53f92df7-4712-4bf7-880a-80c1afd22e27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ElevatedRiskNoteReceivableMember_2c21e3a2-ef51-4169-8bb8-e6b4cdd8b62b" xlink:href="hcsg-20211231.xsd#hcsg_ElevatedRiskNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d92980b9-f448-4916-b514-14844ef76d92" xlink:to="loc_hcsg_ElevatedRiskNoteReceivableMember_2c21e3a2-ef51-4169-8bb8-e6b4cdd8b62b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAgeAnalysisofPastDueNoteReceivableDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#AllowanceforDoubtfulAccountsAgeAnalysisofPastDueNoteReceivableDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAgeAnalysisofPastDueNoteReceivableDetails" xlink:type="extended" id="i1db92af1656e4a1498d8a79e17a1c724_AllowanceforDoubtfulAccountsAgeAnalysisofPastDueNoteReceivableDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_518f187e-58f8-434b-b4a7-a16652ac6606" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_326072d4-fd9c-4dcf-ab46-9af52c842f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_518f187e-58f8-434b-b4a7-a16652ac6606" xlink:to="loc_us-gaap_NotesReceivableGross_326072d4-fd9c-4dcf-ab46-9af52c842f3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_bcf209d2-fb19-46fa-9b5a-ec82f53211f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_518f187e-58f8-434b-b4a7-a16652ac6606" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_bcf209d2-fb19-46fa-9b5a-ec82f53211f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_306454f2-5d68-4952-8fe6-37b2b609e68e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_bcf209d2-fb19-46fa-9b5a-ec82f53211f3" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_306454f2-5d68-4952-8fe6-37b2b609e68e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_306454f2-5d68-4952-8fe6-37b2b609e68e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_306454f2-5d68-4952-8fe6-37b2b609e68e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_306454f2-5d68-4952-8fe6-37b2b609e68e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_059ab0f6-151e-4db0-946f-d6b877463c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_306454f2-5d68-4952-8fe6-37b2b609e68e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_059ab0f6-151e-4db0-946f-d6b877463c2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_StandardNoteReceivableMember_9329e46c-9b61-4afb-95a7-961c5148f4bb" xlink:href="hcsg-20211231.xsd#hcsg_StandardNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_059ab0f6-151e-4db0-946f-d6b877463c2c" xlink:to="loc_hcsg_StandardNoteReceivableMember_9329e46c-9b61-4afb-95a7-961c5148f4bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ElevatedRiskNoteReceivableMember_15fc81e7-cede-45af-af3b-b06d959c5dd3" xlink:href="hcsg-20211231.xsd#hcsg_ElevatedRiskNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_059ab0f6-151e-4db0-946f-d6b877463c2c" xlink:to="loc_hcsg_ElevatedRiskNoteReceivableMember_15fc81e7-cede-45af-af3b-b06d959c5dd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fdfc936b-f179-46a4-a935-a5c5b7068068" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_bcf209d2-fb19-46fa-9b5a-ec82f53211f3" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fdfc936b-f179-46a4-a935-a5c5b7068068" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_fdfc936b-f179-46a4-a935-a5c5b7068068_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fdfc936b-f179-46a4-a935-a5c5b7068068" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_fdfc936b-f179-46a4-a935-a5c5b7068068_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_87cf0394-8438-4ad1-a973-a9d8f2cb7650" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fdfc936b-f179-46a4-a935-a5c5b7068068" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_87cf0394-8438-4ad1-a973-a9d8f2cb7650" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_eebd8694-0ba1-4b62-b844-af33fc1fcdf2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_87cf0394-8438-4ad1-a973-a9d8f2cb7650" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_eebd8694-0ba1-4b62-b844-af33fc1fcdf2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancialAsset0To90DaysPastDueMember_b1b2e741-877e-4b50-9b56-bca7f88ffdda" xlink:href="hcsg-20211231.xsd#hcsg_FinancialAsset0To90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_eebd8694-0ba1-4b62-b844-af33fc1fcdf2" xlink:to="loc_hcsg_FinancialAsset0To90DaysPastDueMember_b1b2e741-877e-4b50-9b56-bca7f88ffdda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancialAsset91To180DaysPastDueMember_2a48c08b-8c55-4073-b0f5-c20f8fe6f60c" xlink:href="hcsg-20211231.xsd#hcsg_FinancialAsset91To180DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_eebd8694-0ba1-4b62-b844-af33fc1fcdf2" xlink:to="loc_hcsg_FinancialAsset91To180DaysPastDueMember_2a48c08b-8c55-4073-b0f5-c20f8fe6f60c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_FinancialAssetEqualToOrGreaterThan181DaysPastDueMember_2216351e-f8b4-4819-ba25-d1ab3d1df63e" xlink:href="hcsg-20211231.xsd#hcsg_FinancialAssetEqualToOrGreaterThan181DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_eebd8694-0ba1-4b62-b844-af33fc1fcdf2" xlink:to="loc_hcsg_FinancialAssetEqualToOrGreaterThan181DaysPastDueMember_2216351e-f8b4-4819-ba25-d1ab3d1df63e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAllowancefordoubtfulaccountsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#AllowanceforDoubtfulAccountsAllowancefordoubtfulaccountsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsAllowancefordoubtfulaccountsDetails" xlink:type="extended" id="iddac319c785344ff9a52a7eae5b32928_AllowanceforDoubtfulAccountsAllowancefordoubtfulaccountsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_e9f06562-89f8-4766-aafb-31a6ad06ad86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_e9f06562-89f8-4766-aafb-31a6ad06ad86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_acb3b753-428a-40cb-9e13-0d363deb7158" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_e9f06562-89f8-4766-aafb-31a6ad06ad86" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_acb3b753-428a-40cb-9e13-0d363deb7158" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_466b5708-0181-4dea-9336-dfb7a62c1360" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_e9f06562-89f8-4766-aafb-31a6ad06ad86" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_466b5708-0181-4dea-9336-dfb7a62c1360" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_fc86f30e-ef0f-45e4-b2e2-ea4033584abe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_e9f06562-89f8-4766-aafb-31a6ad06ad86" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_fc86f30e-ef0f-45e4-b2e2-ea4033584abe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_a7b6aa5d-f772-49f6-b274-c88db69a0e30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c8a3250a-3349-4131-945f-31f63534b93a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c8a3250a-3349-4131-945f-31f63534b93a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_0738366f-08af-4488-bb3a-ad21ce6ec8dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c8a3250a-3349-4131-945f-31f63534b93a" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_0738366f-08af-4488-bb3a-ad21ce6ec8dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_26dd5b01-a487-4ddc-96c5-0d15ebcb33b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c8a3250a-3349-4131-945f-31f63534b93a" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_26dd5b01-a487-4ddc-96c5-0d15ebcb33b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableChangeInPresentValueExpenseReversal_e4bcd4e4-6c08-40ed-98d8-374bc6219977" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableChangeInPresentValueExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c8a3250a-3349-4131-945f-31f63534b93a" xlink:to="loc_us-gaap_FinancingReceivableChangeInPresentValueExpenseReversal_e4bcd4e4-6c08-40ed-98d8-374bc6219977" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_44254f69-f736-4d6c-8124-47fbd759b126" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_ec6e62bc-ea4e-4bfe-994d-28d3215cda55" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_ec6e62bc-ea4e-4bfe-994d-28d3215cda55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_AccountsAndFinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_71264381-b596-49c8-8e4d-c106f467246d" xlink:href="hcsg-20211231.xsd#hcsg_AccountsAndFinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_hcsg_AccountsAndFinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_71264381-b596-49c8-8e4d-c106f467246d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal_3b00b2fe-0192-4b7e-afb1-f89f765e9490" xlink:href="hcsg-20211231.xsd#hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_hcsg_AccountsAndFinancingReceivableCreditLossExpenseReversal_3b00b2fe-0192-4b7e-afb1-f89f765e9490" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_af493cfd-c438-490a-a484-498572d1c325" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_c9386aab-1b23-41ef-b553-09524a96ec12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_c9386aab-1b23-41ef-b553-09524a96ec12" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_070e6b95-0048-4e09-b8e7-1b6163c28aec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_f25ac84f-4d7e-4251-925e-4e91e340c987" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_070e6b95-0048-4e09-b8e7-1b6163c28aec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ebb5f941-929a-47d2-bf66-42f75cbec9ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_070e6b95-0048-4e09-b8e7-1b6163c28aec" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ebb5f941-929a-47d2-bf66-42f75cbec9ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_ebb5f941-929a-47d2-bf66-42f75cbec9ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ebb5f941-929a-47d2-bf66-42f75cbec9ab" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_ebb5f941-929a-47d2-bf66-42f75cbec9ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a9f93b54-7398-4f31-9929-5f2f4b1a694f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ebb5f941-929a-47d2-bf66-42f75cbec9ab" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a9f93b54-7398-4f31-9929-5f2f4b1a694f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_StandardNoteReceivableMember_4349d212-24e2-431b-a0b7-b06210de04d5" xlink:href="hcsg-20211231.xsd#hcsg_StandardNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a9f93b54-7398-4f31-9929-5f2f4b1a694f" xlink:to="loc_hcsg_StandardNoteReceivableMember_4349d212-24e2-431b-a0b7-b06210de04d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ElevatedRiskNoteReceivableMember_9bfd200d-9f79-40a5-bd8d-fabf57748ac2" xlink:href="hcsg-20211231.xsd#hcsg_ElevatedRiskNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a9f93b54-7398-4f31-9929-5f2f4b1a694f" xlink:to="loc_hcsg_ElevatedRiskNoteReceivableMember_9bfd200d-9f79-40a5-bd8d-fabf57748ac2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_1aa02a64-d572-47ca-9871-9ad6407f7aa7" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_070e6b95-0048-4e09-b8e7-1b6163c28aec" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_1aa02a64-d572-47ca-9871-9ad6407f7aa7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_1aa02a64-d572-47ca-9871-9ad6407f7aa7_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_1aa02a64-d572-47ca-9871-9ad6407f7aa7" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_1aa02a64-d572-47ca-9871-9ad6407f7aa7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9af7546d-eb88-4bde-916f-f9072def36b6" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_1aa02a64-d572-47ca-9871-9ad6407f7aa7" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9af7546d-eb88-4bde-916f-f9072def36b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_0133cd59-bac8-4bf5-b394-3779380359de" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9af7546d-eb88-4bde-916f-f9072def36b6" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_0133cd59-bac8-4bf5-b394-3779380359de" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/LeaseCommitmentsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#LeaseCommitmentsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/LeaseCommitmentsAdditionalInformationDetails" xlink:type="extended" id="i6ae70158240c4271a27a1c3d7537969c_LeaseCommitmentsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_cfa72d3d-a642-46a5-9230-150f3017e3e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_cfa72d3d-a642-46a5-9230-150f3017e3e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_0832e6c4-b226-4c11-b6e2-9a95fad80c27" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_0832e6c4-b226-4c11-b6e2-9a95fad80c27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_LesseeOperatingLeaseTerminationOptionTerm_67471a29-14da-4944-8940-6757abe3a148" xlink:href="hcsg-20211231.xsd#hcsg_LesseeOperatingLeaseTerminationOptionTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_hcsg_LesseeOperatingLeaseTerminationOptionTerm_67471a29-14da-4944-8940-6757abe3a148" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_b67a1052-7dec-4405-b27e-358da1545d6a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_b67a1052-7dec-4405-b27e-358da1545d6a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_60d1eb3b-7635-4084-8321-b60a4ea1717f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_60d1eb3b-7635-4084-8321-b60a4ea1717f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_47047a7c-dbf1-4d95-a63b-ecc912e71da5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_47047a7c-dbf1-4d95-a63b-ecc912e71da5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_OperatingLeaseRightofUseAssetCancellation_2c595a51-0dc5-48b9-8730-ae9ffe554b39" xlink:href="hcsg-20211231.xsd#hcsg_OperatingLeaseRightofUseAssetCancellation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_hcsg_OperatingLeaseRightofUseAssetCancellation_2c595a51-0dc5-48b9-8730-ae9ffe554b39" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_OperatingLeaseLiabilityCancellation_214168f5-b207-426b-b39d-2895e3d39682" xlink:href="hcsg-20211231.xsd#hcsg_OperatingLeaseLiabilityCancellation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_hcsg_OperatingLeaseLiabilityCancellation_214168f5-b207-426b-b39d-2895e3d39682" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_33c2483d-f34b-4591-88b2-9dd71567102c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ac49db23-2bce-4d30-a837-61800084d0f0" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_33c2483d-f34b-4591-88b2-9dd71567102c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2253d7b9-85d6-4bf9-9788-1bae756d94af" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_33c2483d-f34b-4591-88b2-9dd71567102c" xlink:to="loc_srt_RangeAxis_2253d7b9-85d6-4bf9-9788-1bae756d94af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2253d7b9-85d6-4bf9-9788-1bae756d94af_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2253d7b9-85d6-4bf9-9788-1bae756d94af" xlink:to="loc_srt_RangeMember_2253d7b9-85d6-4bf9-9788-1bae756d94af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ddeb6597-990b-4729-aa02-7d15c875ac12" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2253d7b9-85d6-4bf9-9788-1bae756d94af" xlink:to="loc_srt_RangeMember_ddeb6597-990b-4729-aa02-7d15c875ac12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_9e97dd05-5f6c-42b8-96b8-2035f0df1fbe" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ddeb6597-990b-4729-aa02-7d15c875ac12" xlink:to="loc_srt_MinimumMember_9e97dd05-5f6c-42b8-96b8-2035f0df1fbe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e5e56519-79cb-4e7e-9df6-48a0bfcdde29" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ddeb6597-990b-4729-aa02-7d15c875ac12" xlink:to="loc_srt_MaximumMember_e5e56519-79cb-4e7e-9df6-48a0bfcdde29" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationSummaryofStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="extended" id="ifb8c9006863b4eb7aef41b2a1a770265_ShareBasedCompensationSummaryofStockBasedCompensationExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_309b6c95-bd6c-4844-bc74-bcfe2d03d8a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_7e90a0bd-09a5-41bc-8bac-0a22cc4e9e14" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_309b6c95-bd6c-4844-bc74-bcfe2d03d8a1" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_7e90a0bd-09a5-41bc-8bac-0a22cc4e9e14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_992faaf4-923e-4f31-a281-f8e5386f30e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_309b6c95-bd6c-4844-bc74-bcfe2d03d8a1" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_992faaf4-923e-4f31-a281-f8e5386f30e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_329ba2a8-f902-4f8c-9577-8ebfe79801e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_309b6c95-bd6c-4844-bc74-bcfe2d03d8a1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_329ba2a8-f902-4f8c-9577-8ebfe79801e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_adb9cd97-ae14-4c7c-a99c-b6c9d908e979" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_329ba2a8-f902-4f8c-9577-8ebfe79801e7" xlink:to="loc_us-gaap_AwardTypeAxis_adb9cd97-ae14-4c7c-a99c-b6c9d908e979" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_adb9cd97-ae14-4c7c-a99c-b6c9d908e979_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_adb9cd97-ae14-4c7c-a99c-b6c9d908e979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_adb9cd97-ae14-4c7c-a99c-b6c9d908e979_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_adb9cd97-ae14-4c7c-a99c-b6c9d908e979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockOptionMember_f75ad1c3-86e7-49ec-a7c6-f8161dfdee2e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:to="loc_us-gaap_StockOptionMember_f75ad1c3-86e7-49ec-a7c6-f8161dfdee2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsAndDeferredStockUnitsMember_c7b53c2a-2003-4678-b90c-6e54b8558c28" xlink:href="hcsg-20211231.xsd#hcsg_RestrictedStockAndRestrictedStockUnitsRSUsAndDeferredStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:to="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsAndDeferredStockUnitsMember_c7b53c2a-2003-4678-b90c-6e54b8558c28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f06433e7-9c9d-4b68-a0de-d8604e72dd5e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:to="loc_us-gaap_PerformanceSharesMember_f06433e7-9c9d-4b68-a0de-d8604e72dd5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_7447779b-f60f-49b0-9c65-c633fe899100" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_664b3115-2191-474f-a5e7-f00c179f1859" xlink:to="loc_us-gaap_EmployeeStockMember_7447779b-f60f-49b0-9c65-c633fe899100" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationAdditionalInformationDetails" xlink:type="extended" id="id06dae6a6580427bb6b47f9a5a0969f5_ShareBasedCompensationAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4810c9a0-e8c6-4e34-808f-786ff3eb8f48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4810c9a0-e8c6-4e34-808f-786ff3eb8f48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_3bb1744b-cb42-45e8-8a60-eec0b51f56d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_3bb1744b-cb42-45e8-8a60-eec0b51f56d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_9b11fde8-e7b7-4a13-9299-070e15a79bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_9b11fde8-e7b7-4a13-9299-070e15a79bf3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_4ad47f89-790e-4961-8b38-1a7c6fd47846" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_4ad47f89-790e-4961-8b38-1a7c6fd47846" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c1bda6e8-54b9-40fe-b20d-0cd2158c0622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c1bda6e8-54b9-40fe-b20d-0cd2158c0622" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3e8df14f-dc5e-43ad-bd77-df10d294b879" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3e8df14f-dc5e-43ad-bd77-df10d294b879" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_60072291-863d-450c-b6f9-149a3a640da8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_60072291-863d-450c-b6f9-149a3a640da8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_a5c3c152-afd8-4d5c-9ad0-38831251e509" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_a5c3c152-afd8-4d5c-9ad0-38831251e509" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions_785e6650-ab8b-466d-8aef-305912fe3ca6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions_785e6650-ab8b-466d-8aef-305912fe3ca6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_c905871f-bbe3-4a26-a68f-643f7331b16c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_c905871f-bbe3-4a26-a68f-643f7331b16c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bb33064f-d0b3-4727-a166-540886cd5ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bb33064f-d0b3-4727-a166-540886cd5ff4" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9bc034ee-da70-47c5-855a-4fd17cf50f3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9bc034ee-da70-47c5-855a-4fd17cf50f3f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPayoutPeriod_58621072-abfe-446b-a2e6-66ce14166c46" xlink:href="hcsg-20211231.xsd#hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPayoutPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPayoutPeriod_58621072-abfe-446b-a2e6-66ce14166c46" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardRequisiteAverageWeeklyHoursofWork_320d01c1-e8d5-4213-b5a2-b71d2d8ea9fe" xlink:href="hcsg-20211231.xsd#hcsg_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardRequisiteAverageWeeklyHoursofWork"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardRequisiteAverageWeeklyHoursofWork_320d01c1-e8d5-4213-b5a2-b71d2d8ea9fe" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_b328440e-473d-49b3-b8c2-7f4ae3defafd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_b328440e-473d-49b3-b8c2-7f4ae3defafd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_c5e4a6f8-5ba3-42a1-b1d4-1165e42b3a48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_c5e4a6f8-5ba3-42a1-b1d4-1165e42b3a48" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarnings_b11891e7-de73-40b8-b519-4c2a405104c5" xlink:href="hcsg-20211231.xsd#hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarnings_b11891e7-de73-40b8-b519-4c2a405104c5" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarningPercentOfTaxLimitation_bc8d0317-e7c6-4812-a128-0fd0dc63e547" xlink:href="hcsg-20211231.xsd#hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarningPercentOfTaxLimitation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualEarningPercentOfTaxLimitation_bc8d0317-e7c6-4812-a128-0fd0dc63e547" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfSharesPerEmployeePerCalendarYear_e1369791-50f6-43bd-8ec3-689a2d0b076f" xlink:href="hcsg-20211231.xsd#hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfSharesPerEmployeePerCalendarYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfSharesPerEmployeePerCalendarYear_e1369791-50f6-43bd-8ec3-689a2d0b076f" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_4710291d-812c-491e-9e80-7d9550aaea8b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_4710291d-812c-491e-9e80-7d9550aaea8b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_a8691700-9d98-4868-bb57-1ae90e949b17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_a8691700-9d98-4868-bb57-1ae90e949b17" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationPlanPercentageOfPreTaxIncomeAllowParticipantsToDefer_a04ac05c-41a5-467d-acd3-2c832566f896" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationPlanPercentageOfPreTaxIncomeAllowParticipantsToDefer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_DeferredCompensationPlanPercentageOfPreTaxIncomeAllowParticipantsToDefer_a04ac05c-41a5-467d-acd3-2c832566f896" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationArrangementEmployerContributionPercentageOfParticipantDeferral_54b01518-31da-4f04-9a43-a1fc6fd8b21f" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationArrangementEmployerContributionPercentageOfParticipantDeferral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_DeferredCompensationArrangementEmployerContributionPercentageOfParticipantDeferral_54b01518-31da-4f04-9a43-a1fc6fd8b21f" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationPlanPercentageDeferralInCommonStock_94042a32-fde8-40bf-8610-6497f676986e" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationPlanPercentageDeferralInCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_DeferredCompensationPlanPercentageDeferralInCommonStock_94042a32-fde8-40bf-8610-6497f676986e" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardFullVestInMatchingContribution_91730dcc-0439-4848-8f55-35a8457b058c" xlink:href="hcsg-20211231.xsd#hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardFullVestInMatchingContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardFullVestInMatchingContribution_91730dcc-0439-4848-8f55-35a8457b058c" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_3619fb9b-f5bd-4f17-b656-04e7958213e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_3619fb9b-f5bd-4f17-b656-04e7958213e9" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationArrangementWithIndividualRemainingSharesAuthorizedForIssuance_9c248049-b808-4bca-b544-abf4951a8122" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationArrangementWithIndividualRemainingSharesAuthorizedForIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_DeferredCompensationArrangementWithIndividualRemainingSharesAuthorizedForIssuance_9c248049-b808-4bca-b544-abf4951a8122" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationArrangementWithIndividualSharesVestedAndOutstanding_607a4eef-2ce8-4e48-a34f-82caa233ed10" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationArrangementWithIndividualSharesVestedAndOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_hcsg_DeferredCompensationArrangementWithIndividualSharesVestedAndOutstanding_607a4eef-2ce8-4e48-a34f-82caa233ed10" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_99e3e657-c1ac-43a1-9f91-2a21bfe1a8d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9aa9a05a-107a-415b-adc1-290809f9c245" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_99e3e657-c1ac-43a1-9f91-2a21bfe1a8d5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_3eace082-58c9-40ab-a42f-59a3e1533db1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_99e3e657-c1ac-43a1-9f91-2a21bfe1a8d5" xlink:to="loc_us-gaap_PlanNameAxis_3eace082-58c9-40ab-a42f-59a3e1533db1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_3eace082-58c9-40ab-a42f-59a3e1533db1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_3eace082-58c9-40ab-a42f-59a3e1533db1" xlink:to="loc_us-gaap_PlanNameDomain_3eace082-58c9-40ab-a42f-59a3e1533db1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_40911995-b08b-4cc6-ab9d-92429c24e10b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_3eace082-58c9-40ab-a42f-59a3e1533db1" xlink:to="loc_us-gaap_PlanNameDomain_40911995-b08b-4cc6-ab9d-92429c24e10b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_A2020OmnibusIncentivePlanMember_14be7c0a-a002-4e8d-a42e-131f5f56ef72" xlink:href="hcsg-20211231.xsd#hcsg_A2020OmnibusIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_40911995-b08b-4cc6-ab9d-92429c24e10b" xlink:to="loc_hcsg_A2020OmnibusIncentivePlanMember_14be7c0a-a002-4e8d-a42e-131f5f56ef72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_99e3e657-c1ac-43a1-9f91-2a21bfe1a8d5" xlink:to="loc_us-gaap_AwardTypeAxis_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_c5df5d6f-6302-4e0d-abe5-7f87bdeccb1e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_9b5f86b6-d9af-422d-a24b-27896214133f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_9b5f86b6-d9af-422d-a24b-27896214133f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_6fba9210-b669-47c0-8cc3-5cc234c70d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_us-gaap_RestrictedStockMember_6fba9210-b669-47c0-8cc3-5cc234c70d5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember_f6295d46-e329-4112-b3cc-c19be98e3eb6" xlink:href="hcsg-20211231.xsd#hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember_f6295d46-e329-4112-b3cc-c19be98e3eb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_4561952b-f51f-4615-b8c1-21e33a6619f7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_us-gaap_PerformanceSharesMember_4561952b-f51f-4615-b8c1-21e33a6619f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredStockUnitsMember_ac8b10a3-83f9-4e76-b503-b000b5d8865d" xlink:href="hcsg-20211231.xsd#hcsg_DeferredStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_hcsg_DeferredStockUnitsMember_ac8b10a3-83f9-4e76-b503-b000b5d8865d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_76b0a488-cab5-43f1-9742-947587bed793" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c94823ab-ef67-4d53-9bdc-c49aaf0d55b0" xlink:to="loc_us-gaap_EmployeeStockMember_76b0a488-cab5-43f1-9742-947587bed793" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_19608be6-f776-456b-8074-3be256fd8b06" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_99e3e657-c1ac-43a1-9f91-2a21bfe1a8d5" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_19608be6-f776-456b-8074-3be256fd8b06" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_19608be6-f776-456b-8074-3be256fd8b06_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_19608be6-f776-456b-8074-3be256fd8b06" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_19608be6-f776-456b-8074-3be256fd8b06_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_bd97ce7c-6a85-41a2-8521-02b56f116901" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_19608be6-f776-456b-8074-3be256fd8b06" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_bd97ce7c-6a85-41a2-8521-02b56f116901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_835ab61b-fb51-47d9-b360-4f82205157bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_bd97ce7c-6a85-41a2-8521-02b56f116901" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_835ab61b-fb51-47d9-b360-4f82205157bb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationSummaryofRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofRestrictedStockUnitsDetails" xlink:type="extended" id="i622fe06092134a209238034162ff4207_ShareBasedCompensationSummaryofRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f05e1dfe-4ead-45fd-97e6-b8df9c34d295" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f05e1dfe-4ead-45fd-97e6-b8df9c34d295" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_99d60c80-4db8-4648-9fa2-f3d476f65357" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_99d60c80-4db8-4648-9fa2-f3d476f65357" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_829ab18e-9656-4191-880e-9fc4aa8b3b11" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_829ab18e-9656-4191-880e-9fc4aa8b3b11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_76ebb2d9-8100-46af-a520-68f21fc0be4b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_76ebb2d9-8100-46af-a520-68f21fc0be4b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_83834053-8861-444e-9972-194376e96604" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d2a415a0-01fb-4a5a-8e60-d2a0dba8adc2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_83834053-8861-444e-9972-194376e96604" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6f0b68f9-a1fb-49c5-977d-7b5e4db9fba9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f05e1dfe-4ead-45fd-97e6-b8df9c34d295" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_86e6e1b5-8035-4e4d-aa56-a1f290e12744" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_86e6e1b5-8035-4e4d-aa56-a1f290e12744" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8871b255-5412-4cf8-9665-105dd9a5bed1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8871b255-5412-4cf8-9665-105dd9a5bed1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a3e65b60-7f7c-480c-96cb-beb39a62890e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a3e65b60-7f7c-480c-96cb-beb39a62890e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_bdd08e81-a542-41a7-8d4e-1d506c295de5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_b74b9ccc-c639-40c8-9ca6-ae1e0eca97f2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_bdd08e81-a542-41a7-8d4e-1d506c295de5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2d085ee0-7eb9-4eab-8b4e-592afd7315ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a2403c4a-75c0-4576-96c5-26b825405136" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f05e1dfe-4ead-45fd-97e6-b8df9c34d295" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a2403c4a-75c0-4576-96c5-26b825405136" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_30c5ea45-0199-4c75-8156-9aaa1b5336ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a2403c4a-75c0-4576-96c5-26b825405136" xlink:to="loc_us-gaap_AwardTypeAxis_30c5ea45-0199-4c75-8156-9aaa1b5336ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_30c5ea45-0199-4c75-8156-9aaa1b5336ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_30c5ea45-0199-4c75-8156-9aaa1b5336ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_30c5ea45-0199-4c75-8156-9aaa1b5336ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac578ab5-8e4d-482d-a0b4-a8686601ee0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_30c5ea45-0199-4c75-8156-9aaa1b5336ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac578ab5-8e4d-482d-a0b4-a8686601ee0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember_54e9bbd4-07bd-405f-aee3-6a9046fcef2b" xlink:href="hcsg-20211231.xsd#hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ac578ab5-8e4d-482d-a0b4-a8686601ee0a" xlink:to="loc_hcsg_RestrictedStockAndRestrictedStockUnitsRSUsMember_54e9bbd4-07bd-405f-aee3-6a9046fcef2b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofOutstandingPerformanceStockUnitsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationSummaryofOutstandingPerformanceStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofOutstandingPerformanceStockUnitsDetails" xlink:type="extended" id="if1b5ae7ee22049e489e053a47e4eecf4_ShareBasedCompensationSummaryofOutstandingPerformanceStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe449595-88b8-48c9-8b32-e7116c3442b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe449595-88b8-48c9-8b32-e7116c3442b4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d07a92be-6281-40a0-ab9d-623c7c9b39eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d07a92be-6281-40a0-ab9d-623c7c9b39eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_046bb9da-e1fd-491b-bd2a-b49020540024" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_046bb9da-e1fd-491b-bd2a-b49020540024" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_e2eefb48-7954-4988-9aa3-d7f27b95729a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_e2eefb48-7954-4988-9aa3-d7f27b95729a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b9fa3b5b-d472-43c1-a797-6419c8a63315" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_d469a7b4-ea5e-45c6-94f2-4355f4eb94f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b9fa3b5b-d472-43c1-a797-6419c8a63315" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_9a43aa72-0976-4b2e-ba73-7539fb80a623" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe449595-88b8-48c9-8b32-e7116c3442b4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_25c620bb-8ee7-44b6-83da-6ae29d6d2242" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_25c620bb-8ee7-44b6-83da-6ae29d6d2242" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3d0cd1ee-6ab7-40aa-9b3b-e4112bf26c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3d0cd1ee-6ab7-40aa-9b3b-e4112bf26c7a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0cf3b556-ff7a-4c21-822a-d9707294a85d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0cf3b556-ff7a-4c21-822a-d9707294a85d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a70e2423-2d75-4e15-b5bc-565def5b5f89" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_e84a1494-61de-414f-b166-77e5ae45e2c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a70e2423-2d75-4e15-b5bc-565def5b5f89" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_341cd73d-a393-4dc0-be17-ffe1ced8632d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b0b7c1f3-d4ef-4609-8f03-d88a2d2df436" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe449595-88b8-48c9-8b32-e7116c3442b4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b0b7c1f3-d4ef-4609-8f03-d88a2d2df436" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_92f35336-1af9-4240-8d8b-5df1a9b601c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b0b7c1f3-d4ef-4609-8f03-d88a2d2df436" xlink:to="loc_us-gaap_AwardTypeAxis_92f35336-1af9-4240-8d8b-5df1a9b601c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_92f35336-1af9-4240-8d8b-5df1a9b601c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_92f35336-1af9-4240-8d8b-5df1a9b601c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_92f35336-1af9-4240-8d8b-5df1a9b601c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b4dd80f9-4c84-4a1a-b849-047693c6a786" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_92f35336-1af9-4240-8d8b-5df1a9b601c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b4dd80f9-4c84-4a1a-b849-047693c6a786" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_3aba99d7-4244-4284-b5f5-8d5827b028cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b4dd80f9-4c84-4a1a-b849-047693c6a786" xlink:to="loc_us-gaap_PerformanceSharesMember_3aba99d7-4244-4284-b5f5-8d5827b028cd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofESPPAnnualOfferingsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationSummaryofESPPAnnualOfferingsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationSummaryofESPPAnnualOfferingsDetails" xlink:type="extended" id="i72ba9564a0f6468eba5564037985ea80_ShareBasedCompensationSummaryofESPPAnnualOfferingsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d7ad78c-84e2-42df-89ef-3f74c91c5fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward_bb6e185e-5592-4a72-82de-831ec27cbcd0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d7ad78c-84e2-42df-89ef-3f74c91c5fe9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward_bb6e185e-5592-4a72-82de-831ec27cbcd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_7c77328a-7517-4a72-81e2-46e0d37dfe94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d7ad78c-84e2-42df-89ef-3f74c91c5fe9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_7c77328a-7517-4a72-81e2-46e0d37dfe94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0686016d-1e78-4192-9fe4-d76134a8b60d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d7ad78c-84e2-42df-89ef-3f74c91c5fe9" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0686016d-1e78-4192-9fe4-d76134a8b60d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2574af5a-061a-4ea4-a0d7-c4f46b5970b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0686016d-1e78-4192-9fe4-d76134a8b60d" xlink:to="loc_us-gaap_AwardTypeAxis_2574af5a-061a-4ea4-a0d7-c4f46b5970b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2574af5a-061a-4ea4-a0d7-c4f46b5970b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2574af5a-061a-4ea4-a0d7-c4f46b5970b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2574af5a-061a-4ea4-a0d7-c4f46b5970b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6dc0826c-015a-48d1-84aa-5a8557423ce5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2574af5a-061a-4ea4-a0d7-c4f46b5970b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6dc0826c-015a-48d1-84aa-5a8557423ce5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_207e1d63-2d4a-48ca-b4c2-660fe45290fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6dc0826c-015a-48d1-84aa-5a8557423ce5" xlink:to="loc_us-gaap_EmployeeStockMember_207e1d63-2d4a-48ca-b4c2-660fe45290fb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails" xlink:type="extended" id="if9d44310db40445092d0fac0b67d6841_ShareBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d4b2163b-538d-4b38-aad2-dbfcdc659993" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d4b2163b-538d-4b38-aad2-dbfcdc659993" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_b14a176a-1527-41b3-9c1e-dab041818ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_b14a176a-1527-41b3-9c1e-dab041818ed4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_381541e6-d7a0-47df-9cdd-18ee59966796" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_381541e6-d7a0-47df-9cdd-18ee59966796" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_a4848718-73a1-40b3-b4a9-6b740dbcbc74" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_a4848718-73a1-40b3-b4a9-6b740dbcbc74" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_733f0b29-8a2b-4956-959c-021059455341" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c9eefddb-7d74-4b20-a6c1-2dc46922425e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_733f0b29-8a2b-4956-959c-021059455341" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_97776262-6ea8-42d3-9fec-e4130498f93a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_733f0b29-8a2b-4956-959c-021059455341" xlink:to="loc_us-gaap_AwardTypeAxis_97776262-6ea8-42d3-9fec-e4130498f93a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_97776262-6ea8-42d3-9fec-e4130498f93a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_97776262-6ea8-42d3-9fec-e4130498f93a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_97776262-6ea8-42d3-9fec-e4130498f93a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_05d255e0-10a5-4da1-a1a8-a1ef6ef0705b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_97776262-6ea8-42d3-9fec-e4130498f93a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_05d255e0-10a5-4da1-a1a8-a1ef6ef0705b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_efe71eb1-d47d-4dc7-b6b6-3fe1b79e2267" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_05d255e0-10a5-4da1-a1a8-a1ef6ef0705b" xlink:to="loc_us-gaap_EmployeeStockMember_efe71eb1-d47d-4dc7-b6b6-3fe1b79e2267" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ShareBasedCompensationDeferredCompensationPlanDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ShareBasedCompensationDeferredCompensationPlanDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ShareBasedCompensationDeferredCompensationPlanDetails" xlink:type="extended" id="i269c01abdfbf4fb8804256f6742ce84c_ShareBasedCompensationDeferredCompensationPlanDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_c6ec2ae3-67cb-4f21-93de-6340a19ec123" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_c6ec2ae3-67cb-4f21-93de-6340a19ec123" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_3a138153-12d8-4909-8825-9cf398ee0339" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued_3a138153-12d8-4909-8825-9cf398ee0339" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationTrustAccountBalance_a98a1b55-b6e0-4112-a4e2-126f477e28e0" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationTrustAccountBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:to="loc_hcsg_DeferredCompensationTrustAccountBalance_a98a1b55-b6e0-4112-a4e2-126f477e28e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DeferredCompensationUnrealizedGainLossRecordedWithinDeferredCompensationLiabilityAccount_b7802ecc-0b20-4f2c-b90e-ac685956740d" xlink:href="hcsg-20211231.xsd#hcsg_DeferredCompensationUnrealizedGainLossRecordedWithinDeferredCompensationLiabilityAccount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:to="loc_hcsg_DeferredCompensationUnrealizedGainLossRecordedWithinDeferredCompensationLiabilityAccount_b7802ecc-0b20-4f2c-b90e-ac685956740d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f260be43-487e-4940-a300-6b5e9c7e9075" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_762553df-1ee5-4192-a658-698878a7d5d2" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f260be43-487e-4940-a300-6b5e9c7e9075" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_3626a8ce-8355-487c-b63c-22bb65d6055d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f260be43-487e-4940-a300-6b5e9c7e9075" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_3626a8ce-8355-487c-b63c-22bb65d6055d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_3626a8ce-8355-487c-b63c-22bb65d6055d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_3626a8ce-8355-487c-b63c-22bb65d6055d" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_3626a8ce-8355-487c-b63c-22bb65d6055d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_eefcc6d6-6812-4eaf-ab6f-106c78d407bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_3626a8ce-8355-487c-b63c-22bb65d6055d" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_eefcc6d6-6812-4eaf-ab6f-106c78d407bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_0cdcb41f-0ada-4cf1-8ba2-fcbbf0cbc442" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_eefcc6d6-6812-4eaf-ab6f-106c78d407bd" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_0cdcb41f-0ada-4cf1-8ba2-fcbbf0cbc442" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/IncomeTaxesSignificantComponentsofFederalandStateDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#IncomeTaxesSignificantComponentsofFederalandStateDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/IncomeTaxesSignificantComponentsofFederalandStateDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended" id="ibb56c8f32fd8474a93bd4bc413a6415e_IncomeTaxesSignificantComponentsofFederalandStateDeferredTaxAssetsandLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_bec262b8-9265-49cc-8726-af73639ae6af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_b2519560-7252-4415-9951-0cb59d0b0f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bec262b8-9265-49cc-8726-af73639ae6af" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_b2519560-7252-4415-9951-0cb59d0b0f6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_ee5feb2e-eb26-4d58-8e43-4d110bcc443e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bec262b8-9265-49cc-8726-af73639ae6af" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_ee5feb2e-eb26-4d58-8e43-4d110bcc443e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e43d4aa-f01a-474e-9de7-2a68e78c031c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bec262b8-9265-49cc-8726-af73639ae6af" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e43d4aa-f01a-474e-9de7-2a68e78c031c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_d063def7-362e-4333-a740-d9b621c9d23b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e43d4aa-f01a-474e-9de7-2a68e78c031c" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_d063def7-362e-4333-a740-d9b621c9d23b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d063def7-362e-4333-a740-d9b621c9d23b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d063def7-362e-4333-a740-d9b621c9d23b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d063def7-362e-4333-a740-d9b621c9d23b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9378e5c3-1297-4c51-a862-7eeec887f48a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d063def7-362e-4333-a740-d9b621c9d23b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9378e5c3-1297-4c51-a862-7eeec887f48a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ManufacturerOfPrepackagedMealsMember_6b1c7043-4d18-4ecc-8595-536b254e29c5" xlink:href="hcsg-20211231.xsd#hcsg_ManufacturerOfPrepackagedMealsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9378e5c3-1297-4c51-a862-7eeec887f48a" xlink:to="loc_hcsg_ManufacturerOfPrepackagedMealsMember_6b1c7043-4d18-4ecc-8595-536b254e29c5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SegmentInformationScheduleofSegmentInformationDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#SegmentInformationScheduleofSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/SegmentInformationScheduleofSegmentInformationDetails" xlink:type="extended" id="i20f33eef9d834655b5aef9d8227fc47b_SegmentInformationScheduleofSegmentInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_302237b5-b1d2-4ddd-b7b2-9098ad292627" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_302237b5-b1d2-4ddd-b7b2-9098ad292627" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93ccb008-641d-4258-b93d-61724716bd33" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93ccb008-641d-4258-b93d-61724716bd33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_74bc312a-4821-4c67-99fe-412b404cfeb5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_74bc312a-4821-4c67-99fe-412b404cfeb5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_df0d18a4-e4c8-4710-81bd-5a76f299d12b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_Assets_df0d18a4-e4c8-4710-81bd-5a76f299d12b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_c83f03f5-b744-4cc6-82b7-b841a7fa2cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_c83f03f5-b744-4cc6-82b7-b841a7fa2cb0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_23e3c321-f31f-4741-b39c-ed7315239e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_23e3c321-f31f-4741-b39c-ed7315239e9d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a2115705-d74e-4b3a-a794-0a240438934c" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_9a0b9567-ddbc-49f9-9523-8a7fe062acdf" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:to="loc_srt_ConsolidationItemsAxis_9a0b9567-ddbc-49f9-9523-8a7fe062acdf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_9a0b9567-ddbc-49f9-9523-8a7fe062acdf_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_9a0b9567-ddbc-49f9-9523-8a7fe062acdf" xlink:to="loc_srt_ConsolidationItemsDomain_9a0b9567-ddbc-49f9-9523-8a7fe062acdf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_14c85328-4d44-4932-900a-de688c22e8b2" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_9a0b9567-ddbc-49f9-9523-8a7fe062acdf" xlink:to="loc_srt_ConsolidationItemsDomain_14c85328-4d44-4932-900a-de688c22e8b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_cedc1e91-7252-4a0e-b6a9-48ac8d759a05" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_14c85328-4d44-4932-900a-de688c22e8b2" xlink:to="loc_us-gaap_OperatingSegmentsMember_cedc1e91-7252-4a0e-b6a9-48ac8d759a05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_CorporateAndEliminationsMember_39ca41c5-c64f-4667-a216-9ef7dda59087" xlink:href="hcsg-20211231.xsd#hcsg_CorporateAndEliminationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_14c85328-4d44-4932-900a-de688c22e8b2" xlink:to="loc_hcsg_CorporateAndEliminationsMember_39ca41c5-c64f-4667-a216-9ef7dda59087" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_410b13d9-2210-45a4-afe6-cc50cdca4d27" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_410b13d9-2210-45a4-afe6-cc50cdca4d27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_410b13d9-2210-45a4-afe6-cc50cdca4d27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_410b13d9-2210-45a4-afe6-cc50cdca4d27" xlink:to="loc_us-gaap_SegmentDomain_410b13d9-2210-45a4-afe6-cc50cdca4d27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_10f5f591-d12b-403e-b811-91a516bc1143" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_410b13d9-2210-45a4-afe6-cc50cdca4d27" xlink:to="loc_us-gaap_SegmentDomain_10f5f591-d12b-403e-b811-91a516bc1143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_HousekeepingServicesMember_ea3f7b1b-907d-4b58-b367-468253a9e614" xlink:href="hcsg-20211231.xsd#hcsg_HousekeepingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_10f5f591-d12b-403e-b811-91a516bc1143" xlink:to="loc_hcsg_HousekeepingServicesMember_ea3f7b1b-907d-4b58-b367-468253a9e614" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_DietaryServicesMember_6795282c-1660-4e41-8087-53fa263c28d5" xlink:href="hcsg-20211231.xsd#hcsg_DietaryServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_10f5f591-d12b-403e-b811-91a516bc1143" xlink:to="loc_hcsg_DietaryServicesMember_6795282c-1660-4e41-8087-53fa263c28d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:to="loc_srt_MajorCustomersAxis_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff" xlink:to="loc_srt_NameOfMajorCustomerDomain_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_97086916-a917-4a7e-8052-ff179b1cf343" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_990f7f5f-03f6-4945-aa69-6f30c9e0a0ff" xlink:to="loc_srt_NameOfMajorCustomerDomain_97086916-a917-4a7e-8052-ff179b1cf343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_GenesisHealthcareIncMember_dfc426d2-5e1d-493c-aa4b-e8c53078c1da" xlink:href="hcsg-20211231.xsd#hcsg_GenesisHealthcareIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_97086916-a917-4a7e-8052-ff179b1cf343" xlink:to="loc_hcsg_GenesisHealthcareIncMember_dfc426d2-5e1d-493c-aa4b-e8c53078c1da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_49e498d7-23d2-4fe1-acf3-720c6ceb05fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_49e498d7-23d2-4fe1-acf3-720c6ceb05fe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_49e498d7-23d2-4fe1-acf3-720c6ceb05fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_49e498d7-23d2-4fe1-acf3-720c6ceb05fe" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_49e498d7-23d2-4fe1-acf3-720c6ceb05fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5327faa2-01c1-4bdc-b2f9-def4689e3ec1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_49e498d7-23d2-4fe1-acf3-720c6ceb05fe" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5327faa2-01c1-4bdc-b2f9-def4689e3ec1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_fd2bc1ba-9666-4d1b-bac5-d7110779735c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5327faa2-01c1-4bdc-b2f9-def4689e3ec1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_fd2bc1ba-9666-4d1b-bac5-d7110779735c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d00d9711-a781-46d1-9d1f-4c8e9b75d257" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_dd1ccaf3-1233-46a4-9858-d00bbc6d168c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_b02e3b23-e7a3-4a0a-bdd4-7651cbbb50ff" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_dd1ccaf3-1233-46a4-9858-d00bbc6d168c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_40cfb447-78f5-4562-8284-0eadb4fd78cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_dd1ccaf3-1233-46a4-9858-d00bbc6d168c" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_40cfb447-78f5-4562-8284-0eadb4fd78cb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ContractualObligationsandOtherContingenciesDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#ContractualObligationsandOtherContingenciesDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/ContractualObligationsandOtherContingenciesDetails" xlink:type="extended" id="i0ecc668727214c94b974b6b3b984fe2c_ContractualObligationsandOtherContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5e2b702d-2b07-4e8d-8c0e-1eecc71261a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5e2b702d-2b07-4e8d-8c0e-1eecc71261a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_528e73db-bd48-4839-a2ba-c7516fae4be4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_528e73db-bd48-4839-a2ba-c7516fae4be4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_e540f0ac-dec5-407a-92e3-5df5e1d84fd6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_LineOfCredit_e540f0ac-dec5-407a-92e3-5df5e1d84fd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_2687b85b-8e39-4ba5-b402-8c61f3a4fbef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_2687b85b-8e39-4ba5-b402-8c61f3a4fbef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_LineofCreditFacilityIncreaseDecreaseRemainingBorrowingCapacity_45e0e7e5-6d41-4763-a20d-fd4bab5cccbe" xlink:href="hcsg-20211231.xsd#hcsg_LineofCreditFacilityIncreaseDecreaseRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_hcsg_LineofCreditFacilityIncreaseDecreaseRemainingBorrowingCapacity_45e0e7e5-6d41-4763-a20d-fd4bab5cccbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e8f3101c-6f8d-480a-a8c9-4e8f2bfd80de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e8f3101c-6f8d-480a-a8c9-4e8f2bfd80de" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_a029ba4e-dd11-4c1c-b57e-b0995bd373a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_a029ba4e-dd11-4c1c-b57e-b0995bd373a1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_d0b0201f-9ed5-4f35-b3d2-d83511df40b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_ba4f726d-655b-4280-a36a-1bb293e9a7eb" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_d0b0201f-9ed5-4f35-b3d2-d83511df40b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_d5114a5f-6ebb-4e38-914c-14cb77712bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_d0b0201f-9ed5-4f35-b3d2-d83511df40b3" xlink:to="loc_us-gaap_VariableRateAxis_d5114a5f-6ebb-4e38-914c-14cb77712bb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_d5114a5f-6ebb-4e38-914c-14cb77712bb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_d5114a5f-6ebb-4e38-914c-14cb77712bb4" xlink:to="loc_us-gaap_VariableRateDomain_d5114a5f-6ebb-4e38-914c-14cb77712bb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_02298f00-9b23-4e54-a6e4-f488c08c210b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_d5114a5f-6ebb-4e38-914c-14cb77712bb4" xlink:to="loc_us-gaap_VariableRateDomain_02298f00-9b23-4e54-a6e4-f488c08c210b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PrimeRateOrOvernightBankFundingRateMember_c2dd6406-ea43-4ede-9dfc-6bb35a0aa440" xlink:href="hcsg-20211231.xsd#hcsg_PrimeRateOrOvernightBankFundingRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_02298f00-9b23-4e54-a6e4-f488c08c210b" xlink:to="loc_hcsg_PrimeRateOrOvernightBankFundingRateMember_c2dd6406-ea43-4ede-9dfc-6bb35a0aa440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_fe037756-8fd9-4ce2-b3a3-c9ff28c1ca50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_02298f00-9b23-4e54-a6e4-f488c08c210b" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_fe037756-8fd9-4ce2-b3a3-c9ff28c1ca50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_9c30f5d2-45f2-4bab-b844-63f7e6404029" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_d0b0201f-9ed5-4f35-b3d2-d83511df40b3" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_9c30f5d2-45f2-4bab-b844-63f7e6404029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_9c30f5d2-45f2-4bab-b844-63f7e6404029_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_9c30f5d2-45f2-4bab-b844-63f7e6404029" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_9c30f5d2-45f2-4bab-b844-63f7e6404029_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_1c5381f0-0453-4f31-abca-c493e3f93d5c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_9c30f5d2-45f2-4bab-b844-63f7e6404029" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_1c5381f0-0453-4f31-abca-c493e3f93d5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_591cca09-83df-47b3-aa1f-8d5373ee2a4d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_1c5381f0-0453-4f31-abca-c493e3f93d5c" xlink:to="loc_us-gaap_LetterOfCreditMember_591cca09-83df-47b3-aa1f-8d5373ee2a4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_f9737d13-9e88-4ece-ad7c-4dfc010eca5b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_d0b0201f-9ed5-4f35-b3d2-d83511df40b3" xlink:to="loc_srt_LitigationCaseAxis_f9737d13-9e88-4ece-ad7c-4dfc010eca5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_f9737d13-9e88-4ece-ad7c-4dfc010eca5b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_f9737d13-9e88-4ece-ad7c-4dfc010eca5b" xlink:to="loc_srt_LitigationCaseTypeDomain_f9737d13-9e88-4ece-ad7c-4dfc010eca5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_c71831d2-b6fd-4c4c-87ba-616fb0e1998d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_f9737d13-9e88-4ece-ad7c-4dfc010eca5b" xlink:to="loc_srt_LitigationCaseTypeDomain_c71831d2-b6fd-4c4c-87ba-616fb0e1998d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_ShareholderClassActionMember_297915c6-75bb-42a8-acb5-197a1f6e5eda" xlink:href="hcsg-20211231.xsd#hcsg_ShareholderClassActionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_c71831d2-b6fd-4c4c-87ba-616fb0e1998d" xlink:to="loc_hcsg_ShareholderClassActionMember_297915c6-75bb-42a8-acb5-197a1f6e5eda" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="hcsg-20211231.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://hcsgcorp.com/role/SubsequentEventsDetails" xlink:type="extended" id="i144c2cf6d0704073a0f7a47009ae3a49_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_60a39889-a80b-4307-8680-bc2523c5432d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_4c4b9167-7079-45b9-8517-6217d504e787" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_60a39889-a80b-4307-8680-bc2523c5432d" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_4c4b9167-7079-45b9-8517-6217d504e787" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_dfa9116e-a6ca-413c-80d7-e73596901f67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_60a39889-a80b-4307-8680-bc2523c5432d" xlink:to="loc_us-gaap_SubsequentEventTable_dfa9116e-a6ca-413c-80d7-e73596901f67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_f102da33-0885-43f8-9772-cdc4739b0aee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_dfa9116e-a6ca-413c-80d7-e73596901f67" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_f102da33-0885-43f8-9772-cdc4739b0aee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_f102da33-0885-43f8-9772-cdc4739b0aee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_f102da33-0885-43f8-9772-cdc4739b0aee" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_f102da33-0885-43f8-9772-cdc4739b0aee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4eaa939a-9f13-4ea0-ae14-9d08726ca241" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_f102da33-0885-43f8-9772-cdc4739b0aee" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4eaa939a-9f13-4ea0-ae14-9d08726ca241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_3d372a25-2e0d-466d-9b0e-98d506ddd7ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_4eaa939a-9f13-4ea0-ae14-9d08726ca241" xlink:to="loc_us-gaap_SubsequentEventMember_3d372a25-2e0d-466d-9b0e-98d506ddd7ef" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_4a69121a-a976-4a16-b285-04af389b68e4" xlink:href="hcsg-20211231.xsd#hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_hcsg_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_4a69121a-a976-4a16-b285-04af389b68e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
