n. Morning.n. plural One of the canonical hours appointed in the early church, and still observed in the Roman Catholic Church, especially in monastic orders.n. Morning worship, as sung; hence, any morning song: usually in the plural.n. plural A musical setting of any part of the office of matins.Pertaining to the morning; used in the morning.n. A French breed of large dogs, somewhat resembling the great Dane, but rough-coated; also used to some extent for sheep-dogs. Also mâtin-dog.