Breadcrumb Home > Thesaurus > Q Synonyms of quadrillion Find synonyms for: Noun 1. quadrillion, large integer usage: the number that is represented as a one followed by 24 zeros; "in England they call a septillion a quadrillion" 2. quadrillion, large integer usage: the number that is represented as a one followed by 15 zeros WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of quadrillion (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: pecuniary Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language