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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language