What is music?

The definition of music:

1. The art of arranging sounds in time so as to produce a continuous, unified, and evocative composition, as through melody, harmony, rhythm, and timbre.
2. Vocal or instrumental sounds possessing a degree of melody, harmony, or rhythm.
3. The science and the art of tones, or musical sounds, i. e., sounds of higher or lower pitch, begotten of uniform and synchronous vibrations, as of a string at various degrees of tension; the science of harmonical tones which treats of the principles of harmony, or the properties, dependences, and relations of tones to each other; the art of combining tones in a manner to please the ear.