WordNet sense 1 (a play or film whose action and dialogue is interspersed with singing and dancing):

musical comedy, musical theater

WordNet sense 2 (devoted to or appreciative of music):

philharmonic

WordNet sense 3 (pleasing to the ear):

dulcet, sweet

WordNet sense 4 (smooth and flowing):

singing

WordNet sense 5 (richly melodious):

canorous

WordNet sense 6 (containing or constituting or characterized by pleasing melody):

melodic, melodious