verb (used with object), tran·sub·stan·ti·at·ed, tran·sub·stan·ti·at·ing.
to change from one substance into another; transmute.
Theology. to change (the bread and wine) into the body and blood of Christ in the Eucharist.
Origin of transubstantiate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(intr) RC theol (of the Eucharistic bread and wine) to undergo transubstantiation
(tr) to change (one substance) into another; transmute
Word Origin for transubstantiate
C16: from Medieval Latin transsubstantiāre, from Latin trans- + substantia substance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012