Breadcrumb Home > Thesaurus > X Synonyms of xx Find synonyms for: Noun 1. twenty, 20, XX, large integer usage: the cardinal number that is the sum of nineteen and one 2. XX, sex chromosome usage: (genetics) normal complement of sex chromosomes in a female Adjective 1. twenty, 20, xx, cardinal (vs. ordinal) usage: denoting a quantity consisting of 20 items or units WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of xx (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: annular Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language