The meaning of ALIEN is belonging or relating to another person, place, or thing : strange. How to use alien in a sentence. Usage of Alien: Usage Guide Synonym Discussion of Alien.

Sep 10, 2021 · Extraterrestrial life has never been discovered, but that doesn’t mean it doesn’t exist. At NASA, astrobiologists like Lindsay Hays are trying to answer one of the most …

Alien definition: a creature from outer space; extraterrestrial.. See examples of ALIEN used in a sentence.

Aug 28, 2025 · Among the most persistent questions that humanity has asked is whether life exists beyond our small blue planet. The word “alien” evokes both fear and fascination, …

/ 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 means belonging to a different country, race, or group, usually one you do not like or are frightened of. He said they were opposed to the presence of alien forces in the region. You …

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 …

Factsheet What does the word alien mean? There are 15 meanings listed in OED's entry for the word alien. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Definition of alien noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

3 days ago · Interstellar comet 3I/ATLAS is losing an insane amount of mass after making its closest pass of the sun last month, or perihelion, prompting Harvard scientist Avi Loeb to …