high mass

A Roman Catholic or Anglo-Catholic Mass celebrated in full ceremonial form, in which the celebrant is generally assisted by a deacon and, in the Tridentine form, a subdeacon, and accompanied by acolytes, a thurifer, and a choir.

(loosely) Any sung Mass, including a Missa Cantata.

Used other than figuratively or idiomatically: see high, mass.

Alternative letter-case form of High Mass. [A Roman Catholic or Anglo-Catholic Mass celebrated in full ceremonial form, in which the celebrant is generally assisted by a deacon and, in the Tridentine form, a subdeacon, and accompanied by acolytes, a thurifer, and a choir.]