Dictionary

1alien

adjective \ˈā-lē-ən, ˈāl-yən\

: not familiar or like other things you have known : different from what you are used to

: from another country

: too different from something to be acceptable or suitable

Full Definition of ALIEN

1
a :  belonging or relating to another person, place, or thing :  strange
b :  relating, belonging, or owing allegiance to another country or government :  foreign
c :  exotic 1
2
:  differing in nature or character typically to the point of incompatibility
alien·ly adverb
alien·ness \-lē-ən-nəs, -yən-nəs\ noun
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Origin of ALIEN

Middle English, from Anglo-French, from Latin alienus, from alius
First Known Use: 14th century

Synonym Discussion of ALIEN

extrinsic, extraneous, foreign, alien mean external to a thing, its essential nature, or its original character. extrinsic applies to what is distinctly outside the thing in question or is not contained in or derived from its essential nature <sentimental value that is extrinsic to the house's market value>. extraneous applies to what is on or comes from the outside and may or may not be capable of becoming an essential part <arguments extraneous to the issue>. foreign applies to what is so different as to be rejected or repelled or to be incapable of becoming assimilated <techniques foreign to French cuisine>. alien is stronger than foreign in suggesting opposition, repugnance, or irreconcilability <a practice totally alien to her nature>.

2alien

noun

: a person who was born in a different country and is not a citizen of the country in which he or she now lives

: a creature that comes from somewhere other than the planet Earth

Full Definition of ALIEN

1
:  a person of another family, race, or nation
2
:  a foreign-born resident who has not been naturalized and is still a subject or citizen of a foreign country; broadly :  a foreign-born citizen
4
:  exotic 1

First Known Use of ALIEN

14th century

3alien

verb
ALIEN Defined for Kids

1alien

adjective \ˈā-lē-ən, ˈāl-yən\

Definition of ALIEN for Kids

1
:  different from what is familiar <Keeping their hands clean was an alien idea to the young boys.>
2
:  from another country and not a citizen of the country of residence :  foreign <an alien resident>
3
:  from somewhere other than the planet earth <an alien spaceship>

2alien

noun

Definition of ALIEN for Kids

1
:  a resident who was born elsewhere and is not a citizen of the country in which he or she now lives
2
:  a being that comes from somewhere other than the planet earth

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