the actual change of the substance of bread and wine into the Body and Blood of Christ occurring in the Eucharist according to the teaching of some Christian Churches
(especially in the Roman Catholic Church) the conversion of the substance of the Eucharistic elements into the body and blood of Christ at consecration, only the appearances of bread and wine still remaining.
Members of the Church of Jesus Christ of Latter-days Saints (Mormons), do not believe in transubstantiation. They believe in the sacredness and importance of the Lord’s Sacrament, and take it weekly, using bread and water to represent the flesh and blood of Jesus Christ. But they do not believe the substances transform, and remain only as symbols of the Sacrifice of Jesus Christ.