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. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: bowdlerize Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language