Pronunciation: (mat'n),[key] —n. 1. (often cap.)matins.Also,esp. Brit.,mattins.(usually used with a sing. v.)Eccles. a. the first of the seven canonical hours.
b. the service for it, properly beginning at midnight, but sometimes beginning at daybreak.
c. Also calledMorning Prayer. the service of public prayer, said in the morning, in the Anglican Church.
—adj. Also,mat'in•al.pertaining to the morning or to matins.