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Definition of alien noun from the Oxford Advanced Learner's Dictionary

alien

noun
 
 
/ˈeɪliən/
 
/ˈeɪliən/
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  1.  
    (North American English also non-citizen)
    (law or specialist) a person who is not a citizen of the country in which they live or work
    • an illegal alien
    compare resident alien
    Extra Examples
    • During the war, he was imprisoned as an enemy alien.
    • It is illegal for employers to hire aliens not authorized for employment.
    • The provisions would broaden the government's ability to deport aliens.
    Topics Social issuesb2, Crime and punishmentb2
    Oxford Collocations Dictionaryadjective
    • enemy
    • illegal
    • undocumented
    • …
    verb + alien
    • deport
    • apprehend
    • arrest
    • …
    See full entry
  2.  
    a creature from another world
    • aliens from outer space
    Extra Examples
    • Do you genuinely believe that space aliens have landed on our planet?
    • Few movies represent intelligent aliens as physically different from humans.
    • He was convinced that he'd been abducted by aliens.
    • In the movie aliens invade Earth.
    Topics Spaceb2
    Oxford Collocations Dictionaryadjective
    • space
    • giant
    • intelligent
    • …
    alien + verb
    • abduct
    • kidnap
    • invade
    • …
    See full entry
See alien in the Oxford Advanced American DictionarySee alien in the Oxford Learner's Dictionary of Academic English
Check pronunciation: alien

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