Of or relating to an ecumenical council held by the Roman Catholic Church in Trent, Italy, from 1545 to 1563, as a response to calls for reform and the spread of Protestantism.
Of or relating to the decrees, reforms, or results of that council: the Tridentine Catechism.
n. A Roman Catholic who rigorously conforms to the Tridentine Creed formulated at that council.
[Medieval Latin Tridentīnus, from Latin, area around Tridentum, from Tridentum (Trent).]