Breadcrumb Home > Thesaurus > O Synonyms of onetime Find synonyms for: Adjective 1. erstwhile(prenominal), former(prenominal), old, onetime(prenominal), one-time(prenominal), quondam(prenominal), sometime(prenominal), past (vs. present) (vs. future) usage: belonging to some prior time; "erstwhile friend"; "our former glory"; "the once capital of the state"; "her quondam lover" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of onetime (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: suigeneris Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language