/ Dictionary / Index I instantiate: Meaning and Definition of Find definitions for: in•stan•ti•ate Pronunciation: (in-stan'shē-āt"), [key] — -at•ed, -at•ing. to provide an instance of or concrete evidence in support of (a theory, concept, claim, or the like). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instantiate (Thesaurus) instanter instantize Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language