Definitions
1.NounImages that consist of distinct straight and curved lines placed against a (usually plain) background, without gradations in shade (darkness) or hue (color).
2.NounArtwork to be reproduced with one solid color, contrasted with artwork having tone or shading (halftones), or full color (color separations).
3.NounThe outlines of a drawing as opposed to color, shading, and texture.