/ Dictionary / Index C consubstantiate: Meaning and Definition of Find definitions for: con•sub•stan•ti•ate Pronunciation: (kon"sub-stan'shē-āt"), [key] — v., -at•ed, -at•ing. —v.i. to profess the doctrine of consubstantiation. to become united in one common substance or nature. —v.t. to unite in one common substance or nature. to regard as so united. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: consubstantiate (Thesaurus) consubstantial consubstantiation Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language