Breadcrumb Home > Thesaurus > C Synonyms of conclusive Find synonyms for: Adjective 1. conclusive (vs. inconclusive), definitive, determinate, decisive usage: forming an end or termination; especially putting an end to doubt or question; "conclusive proof"; "the evidence is conclusive" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of conclusive (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language