/ Dictionary / Index E existential quantifier: Meaning and Definition of Find definitions for: ex'isten'tial quan'tifier Pronunciation: [key] — Logic. Logic. a quantifier indicating that the sentential function within its scope is true for at least one value of the variable included in the quantifier. Also calledCf. universal quantifier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. existential psychology exit Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language