I'm an artist, so I thought I'd wade in here and see if I can help. The problem is, I can't Despite alot of theorising, absolute definitions are lacking - especially as definitions of art are mutable and changing. What's considered to be art now would not necessarily have had the same title applied to it 100 years ago. That said, the least that can be said of it is that it is a creative process, and in that sense in includes a wide variety of human endeavours. It's just that human beings stratify those process into different values and the perception of these changes over time. This isn't just the case with 'high' art - it applies to music, design, and various other disciplines. Certain sections of society have the power to make definitions, but it's up to the rest of society as to whether they also apply those rules. Alot of the time it does boil down to apparent worth in terms of the response it creates in the percipient, but even that's open to interpretation.