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Definition of “alien” - English Dictionary

"alien" in American English

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aliennoun [C]

 us   /ˈeɪ·li·ən/
a ​person who ​lives in a ​country but is not a ​citizen (= ​member of a ​country with ​specificrights)
An alien is also a ​creature from a ​planet other than Earth.

alienadjective

 us   /ˈeɪ·li·ən/
coming from a different ​country, ​race, or ​group; ​foreign: alien ​customs
(Definition of alien from the Cambridge Academic Content Dictionary © Cambridge University Press)







"alien" in British English

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alienadjective

uk   /ˈeɪ.li.ən/  us   /ˈeɪ.li.ən/

aliennoun [C]

uk   /ˈeɪ.li.ən/  us   /ˈeɪ.li.ən/
(Definition of alien from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

"alien" in Business English

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aliennoun [C]

uk   us   /ˈeɪliən/ US LAW
a ​person who ​lives in a ​foreign country of which they are not a citizen: illegal aliens
alien
adjective [before noun]
They are ​recommending that ​long-term alien ​workers should be ​grantedcitizenship.
(Definition of alien from the Cambridge Business English Dictionary © Cambridge University Press)
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“alien” in Business English

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