(1):
(n.) The book of forms for making, ordaining, and consecrating bishops, priests, and deacons.
(2):
(n.) A book containing the rubrics of the Mass.
(3):
(a.) Of or pertaining to an order.
(4):
(a.) Indicating order or succession; as, the ordinal numbers, first, second, third, etc.
(5):
(n.) A word or number denoting order or succession.