Definition: The Tridentine Mass is a name often applied to the Mass of Pope St. Pius V, promulgated on July 14, 1570, through the apostolic constitution Quo Primum, which standardized the traditional Latin Rite Mass. It was replaced by the Mass of Pope Paul VI in 1969.
Also Known As: The Mass of Pope St. Pius V; the Traditional Latin Mass; the Tridentine Latin Mass; the Traditional Mass; the Old Mass; the Pre-Vatican II Mass
Examples:
"Pope Benedict XVI is expected to release a motu proprio allowing for a broader use of the Tridentine Mass, often known as the Traditional Latin Mass or the Mass of St. Pius V."

