community service com·mu·ni·tyservice uncommon noun 1. a service that is performed for the benefit of the public or its institutions Synonymscommunity servicepublic service 2. an unpaid service for the benefit of the public that is performed by lawbreakers as part (or all) of their sentence Synonymscommunity service Related words Broader terms service WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.