As the pool says the best answer recieves the bounty; be it by improving upon the question.

So, consider what's the best definition of music.

I'll only tell you sir the definition from web.

Music is

vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony

https://www.merriam-webster.com/dictionary/music

Or,

Music is the arrangement of sound to create some combination of form, harmony, melody, rhythm, or otherwise expressive content.

https://en.m.wikipedia.org/wiki/Music