/ Dictionary / Index T transubstantiate: Meaning and Definition of Find definitions for: tran•sub•stan•ti•ate Pronunciation: (tran"sub-stan'shē-āt"), [key] — -at•ed, -at•ing. to change from one substance into another; transmute. to change (the bread and wine) into the body and blood of Christ in the Eucharist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: transubstantiate (Thesaurus) transsonic transubstantiation Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language