MUSIC

 Music is an art of sound in time that expresses ideas and emotions in significant forms through the elements of rhythm, melody, harmony, and color.

the tones or sounds employed, occurring in single line (melody) or multiple lines (harmony), and sounded or to be sounded by one or more voices or instruments, or both.

1200-50; Middle English musike < Latin mūsica < Greek mousikḕ (téchnē) (the art) of the Muse, feminine of mousikós, equivalent to Moûs(a) Muse + -ikos -ic