/ Thesaurus / E Synonyms of existential operator Find synonyms for: Noun1. existential quantifier, existential operator, quantifier, logical quantifierusage: a logical quantifier of a proposition that asserts the existence of at least one thing for which the proposition is trueWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language