Discussion Topic 1: Your Definition of Art

I used to think that art has no definition, as I believe that it's solely just human's expression, and I don't know what else can describe art. Since you know, human's expression are variative wether it's caused by what they feel, how old are they, or how good are they at expressing. Though, not all human's expression counts as art. And I thought, the difference is just that what makes "art" an art is because the way humans express it, wether its unique, hold meanings & experiences, and—pretty much stuffs like that as well. So not just any humans expression is art, but those who hold something in it.