Breadcrumb Home > Thesaurus > O Synonyms of offsider Find synonyms for: Adjective 1. offside (vs. onside), offsides usage: illegally beyond a prescribed line or area or ahead of the ball or puck; "the touchdown was nullified because the left tackle was offside" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of offsider (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: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language