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alien

noun [C]
 
 
/ˈeɪ.li.ən/

Definition

legal someone who lives in a country of which they are not a legal citizen: When war broke out the government rounded up thousands of aliens and put them in temporary camps.Racial issuesRace and ethnicity a creature from a different planetStrange, suspicious and unnatural things and people
(Definition of alien noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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