/ Dictionary / Index E existential: Meaning and Definition of Find definitions for: ex•is•ten•tial Pronunciation: (eg"zi-sten'shul, ek"si-), [key] — adj. pertaining to existence. of, pertaining to, or characteristic of existentialism: an existential hero. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: existential (Thesaurus) existent existentialism Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language