Breadcrumb Home > Thesaurus > P Synonyms of preexist Find synonyms for: Verb1. preexist, exist, beusage: exist beforehand or prior to a certain point in time; "Did this condition pre-exist?"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of preexist (Dictionary) ✖ Related Content Daily Word Quiz: taradiddle Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language