English version

illegal immigrant in Citizenship topic

From Longman Dictionary of Contemporary Englishillegal immigrantilˌlegal ˈimmigrant (also illegal alien American English) noun [countable]  PGCCRIMEsomeone who comes to live in another country without official permission
Examples from the Corpus
illegal immigrantI was warned before I left not to do anything silly, like becoming an illegal immigrant, a runaway.