Breadcrumb Home > Thesaurus > U Synonyms of undefined Find synonyms for: Adjective 1. undefined (vs. defined), vague, indefinable, undefinable, indefinite usage: not precisely limited, determined, or distinguished; "an undefined term"; "undefined authority"; "some undefined sense of excitement"; "vague feelings of sadness"; "a vague uneasiness" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of undefined (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: ailurophobia Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language