| a style of abstract art in which lines, forms, and space are organized in such a way as to provide optical illusions of an ambiguous nature, as alternately advancing and receding squares on a flat surface. |
op art also Op Art  (ŏp)  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. [op(tical) art.] |
