from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A form of art that depicts objects or scenes from everyday life and employs techniques of commercial art and popular illustration.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A genre of art that uses elements of popular culture; often uses techniques from commercial art and advertising
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a school of art that emerged in the United Kingdom in the 1950s and became prevalent in the United States and the United Kingdom in the 1960s; it imitated the techniques of commercial art (as the soup cans of Andy Warhol) and the styles of popular culture and the mass media
By extension, from op art and abbreviation of popular. (Wiktionary)