“Hard-Edge Painting: A term used by critic Jules Langsner in 1959 in speaking of paintings executed in broad, flat areas of color delineated by precise, sharp edges. It developed as a reaction to the spontaneous and painterly handling typical of abstract expressionism. Explored by Ellsworth Kelly, Ad Reinhardt, and Alexander Liberman, among others.”
Excerpted from: Diamond, David G. The Bulfinch Pocket Dictionary of Art Terms. Boston: Little Brown, 1992.