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alien

An alien is a resident from another country who does not have citizenship in the country of residence. (noun)

A person from the United States living in Italy without citizenship is an example of an alien.

Alien means residing in a country without having residency there.
(adjective)

A person living in Ireland without having citizenship there is alien.

Alien means different generally to the point of incompatibility. (adjective)

The idea of multiple gods is an example of something that is alien to many monotheistic people.

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See alien in Webster's New World College Dictionary

See alien in American Heritage Dictionary 4

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