{ ‖‖ } n. [ It., clear dark. ] (a) The arrangement of light and dark parts in a work of art, such as a drawing or painting, whether in monochrome or in color. (b) The art or practice of so arranging the light and dark parts as to produce a harmonious effect. Cf. Clair-obscur. [ 1913 Webster ]

n. A painter who cares for and studies light and shade rather than color. [ 1913 Webster ]