THE most versatile and universal means of expression. Also largely a matter of opinion and apparently something money-makers try to "own."
Music has also been, might I add very wrongly, divided into categories/sub-categories called "genres" that's created an immense level of disunity between music lovers everywhere, causing one group to attack another in favor of their preferred "genre." Really no different from the "money-makers" who try to "own" it.
Rather silly, really, but we're human.
This is an example of the definition for the word, "music."