D defs.my
Entry 2 senses Webster, 1913

Shading

· Shad·ing · IPA /ʃˈeɪdɪŋ/
01 n. Act or process of making a shade.
  1. 1.
    Act or process of making a shade.
  2. 2.
    That filling up which represents the effect of more or less darkness, expressing rotundity, projection, etc., in a picture or a drawing.