certified nursing assistant
noun [ C ] uk/ˌsɜː.tɪ.faɪd ˈnɜː.sɪŋ əˌsɪs.tənt/ us/ˌsɝː.t̬ə.faɪd ˈnɝː.sɪŋ əˌsɪs.tənt/ (abbreviation CNA, /ˌsiː.enˈeɪ/ /ˌsiː.enˈeɪ/)
（美国护理制度下的）注册护士助理，注册护工
in the US, an officially registered person who helps sick or old people with everyday tasks such as washing and dressing, especially in a hospital or nursing home