There must be thousands of possible definitions of Art, each true for somebody. Many will include originality as a factor, but not all.
Personally I think trying to be original is essential, as is a high degree of skill in the medium chosen. However skill alone is Craft, not Art, and Originality alone may be merely a curious experience, odd event, weird graphics or unexpected solution to a mundane design problem.
Writing is an art, although handwriting is a craft. I don't pretend to be much good at either, but here's a chance to see for yourselves.
 - more anon.