Breadcrumb Home > Thesaurus > O Synonyms of overboard Find synonyms for: Adverb 1. overboard usage: to extremes; "he went overboard to please his in-laws" 2. overboard usage: from on board a vessel into the water; "they dropped their garbage overboard" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of overboard (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: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language