noun

1. the art and science of combining vocal or instrumental sounds or tones in varying melody, harmony, rhythm, and timbre, esp. so as to form structurally complete and emotionally expressive compositions
2. the sounds or tones so arranged, or the arrangement of these
3. any rhythmic sequence of pleasing sounds, as of birds, water, etc.
4. 1. a particular form, style, etc. of musical composition or a particular class of musical works or pieces folk music
   2. the body of musical works of a particular style, place, period, or composer
5. the written or printed score of a musical composition
6. ability to respond to or take pleasure in music no music in his soul
7. Rare a group of musical performers

Etymology: ME musike < OFr musique < L musica < Gr mousikē (technē), musical (art), orig. an art of the Muses < mousa, Muse