/ Thesaurus / B Synonyms of big league Find synonyms for: Noun1. major league, big league, majors, league, conferenceusage: the most important league in any sport (especially baseball)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language