Breadcrumb Home > Thesaurus > Z Synonyms of zillion Find synonyms for: Noun 1. million, billion, trillion, zillion, jillion, gazillion, large indefinite quantity, large indefinite amount usage: a very large indefinite number (usually hyperbole); "there were millions of flies" Adjective 1. zillion, cardinal (vs. ordinal) usage: very large indeterminate number; "a zillion people were there" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of zillion (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: antebellum Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language