from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A school of abstract art characterized by the use of geometric shapes and brilliant colors to create optical illusions, as of motion, and free the art of all but visual associations.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A genre of abstract art that uses geometric shapes and vivid colours to create optical illusions, such as an illusion of movement.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a style of abstractionism popular in the 1960s; produces dramatic visual effects with colors and contrasts that are difficult for the eye to resolve
op(tical) art.(American Heritage® Dictionary of the English Language, Fourth Edition)
Short for optical art. (Wiktionary)