1 definition by Ian H. Power
A complex theological term applied to the process of the substance of bread and wine becoming the true substance of the body and blood of Christ. Transubstantiation only occurs when a validly ordained priest, in communion with the Holy See (i.e.: Rome) licitly celebrates mass according to the dictates of same.
Vaildly ordained priest + mass (ie: words of consecration approved by Holy See) + elements of bread and wine = Body and Blood of Christ via. transubstantiation.
by Ian H. Power June 13, 2007