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. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language