col·or·ing / ˈkələring/ (Brit. col·our·ing) • n. 1. the process or skill of applying a substance to something so as to change its original color. ∎ the process of filling in a particular shape or outline with crayons: [as adj.] a coloring book. ∎ a drawing produced in this way.2. visual appearance with regard to color, in particular: ∎ the arrangement of colors and markings on an animal. ∎ the natural hues of a person's skin, hair, and eyes: her fair coloring. ∎ fig. the pervading character or tone of something.3. a substance used to give a particular color to something, esp. food.