community service
noun [ U ] uk/kəˌmjuː.nə.ti ˈsɜː.vɪs/ us/kəˌmjuː.nə.t̬i ˈsɝː.vɪs/
（志愿或替代服刑的）社区服务
work done without payment to help other people. Criminals whose crime was not serious enough for them to be put in prison are sometimes ordered to do community service.