D defs.my
Entry 3 senses Webster, 1913

Casing

/kās'-ĭng/ · Cas·ing · IPA /ˈkeɪsɪŋ/
01 n. The act or process of inclosing in, or covering with, a case or thin substance, as plaster, boards, etc.
  1. 1.
    The act or process of inclosing in, or covering with, a case or thin substance, as plaster, boards, etc.
  2. 2.
    An outside covering, for protection or ornament, or to precent the radiation of heat.
  3. 3.
    An inclosing frame; esp. the framework around a door or a window. See Case, n., 4. See: Case