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- Dictionaryalien/ˈeɪlɪən/
adjective
- 1. belonging to a foreign country: "an alien culture" Similar Opposite
- 2. unfamiliar and disturbing or distasteful: "principles that are alien to them" Similar Opposite
noun
- 1. a foreigner, especially one who is not a naturalized citizen of the country where he or she is living: "an enemy alien" Similar Opposite
- 2. a hypothetical or fictional being from another world: "she discovers that the alien's spaceship has crashed" Similar
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adjective. unlike one's own; strange; not belonging to one: In English class, our teacher treated all slang as alien speech. Synonyms: nonnative, incompatible, inimical, averse, antagonistic, foreign, unknown, unfamiliar, exotic.
Learn the various meanings and uses of the word alien, from foreign or strange to extraterrestrial or illegal. See synonyms, pronunciation, examples and word frequency of alien.
ALIEN definition: 1. strange and not familiar: 2. relating to creatures from another planet: 3. a creature from…. Learn more.
Something that's alien is different or foreign. In science fiction, space aliens come from other planets. When we talk about aliens, or things that are alien, we're talking about things and people that are different and strange to us — like an alien from outer space.
Learn the meaning, pronunciation and usage of the word alien as a noun in English. Find out the difference between alien and resident, alien and non-citizen, and alien and creature from another world.