Casing /(?)/

Cas·ing

Casing

n.
  1. The act or process of inclosing in, or covering with, a case or thin substance, as plaster, boards, etc.
  2. An outside covering, for protection or ornament, or to precent the radiation of heat.
  3. An inclosing frame; esp. the framework around a door or a window. See Case, n., 4.