illegal immigrant
From Longman Dictionary of Contemporary EnglishRelated topics: Citizenshipillegal immigrantilˌlegal ˈimmigrant (also illegal alien American English) noun [countable] PGCCRIMEsomeone who comes to live in another country without official permissionExamples from the Corpusillegal immigrant• I was warned before I left not to do anything silly, like becoming an illegal immigrant, a runaway.