Breadcrumb Home > Thesaurus > U Synonyms of un Find synonyms for: Noun 1. United Nations, UN, world organization, world organisation, international organization, international organisation, global organization usage: an organization of independent states formed in 1945 to promote international peace and security WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of un (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: panache Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language