Beyond aesthetics, there’s that ‘correct’ definition for anything that suggests that all other appropriations are kind of missing the point. Like Eno with Ambient music – not just a music that you can do other things in time to, but music that serves only its function, to be ambient.
With aesthetics, we also have commerce placing demands. Sometimes we swap the two; and we end up creating something that looks nice. We call it art, because it makes us feel nice about ourselves, it even makes us feel less empty, in light of The Spectacle which has commissioned it.