Definitions of musical:

• noun:   a play or film whose action and dialogue is interspersed with singing and dancing
• adjective:   characteristic of or resembling or accompanied by music

  Example: "A musical speaking voice"

• adjective:   talented in or devoted to music

  Example: "Comes from a very musical family"

• adjective:   characterized by or capable of producing music

  Example: "A musical evening"

• adjective:   containing or constituting or characterized by pleasing melody