(1):

(n.) An ode or song of praise or adoration; especially, a religious ode, a sacred lyric; a song of praise or thankgiving intended to be used in religious service; as, the Homeric hymns; Watts' hymns.

(2):

(v. i.) To sing in praise or adoration.

(3):

(v. t.) To praise in song; to worship or extol by singing hymns; to sing.