Breadcrumb Home > Thesaurus > E Synonyms of extraterrestrial Find synonyms for: Noun 1. extraterrestrial being, extraterrestrial, alien, hypothetical creature usage: a form of life assumed to exist outside the Earth or its atmosphere Adjective 1. extraterrestrial usage: originating or located or occurring outside Earth or its atmosphere; "is there extraterrestrial life?" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of extraterrestrial (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: rort Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language