art form

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An activity or a piece of artistic work that can be regarded as a medium of artistic expression.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any activity or piece of work that has artistic merit

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (architecture) a form of artistic expression (such as writing or painting or architecture)