illegal immigrant
noun [ C ] uk/ɪˌliː.ɡəl ˈɪm.ɪ.ɡrənt/ us/ɪˌliː.ɡəl ˈɪm.ɪ.ɡrənt/ (US also illegal alien)
非法移民
someone who lives or works in another country when they do not have the legal right to do this
Note: This term is considered offensive by many people. Use undocumented immigrant or undocumented person instead.