The Collaborative International Dictionary of English v.0.48:

Case \Case\, v. t. [imp. & p. p. Cased; p. pr. & vb. n.
   Casing.]
   1. To cover or protect with, or as with, a case; to inclose.
      [1913 Webster]

            The man who, cased in steel, had passed whole days
            and nights in the saddle.             --Prescott.
      [1913 Webster]

   2. To strip the skin from; as, to case a box. [Obs.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cash \Cash\, v. t. [imp. & p. p. Cashed; p. pr. & vb. n.
   Casing.]
   To pay, or to receive, cash for; to exchange for money; as,
   cash a note or an order.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Casing \Cas"ing\, n.
   1. The act or process of inclosing in, or covering with, a
      case or thin substance, as plaster, boards, etc.
      [1913 Webster]

   2. An outside covering, for protection or ornament, or to
      precent the radiation of heat.
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   3. An inclosing frame; esp. the framework around a door or a
      window. See Case, n., 4.
      [1913 Webster]

WordNet (r) 3.0 (2006):

casing
    n 1: the housing or outer covering of something; "the clock has
         a walnut case" [syn: shell, case, casing]
    2: the outermost covering of a pneumatic tire
    3: the enclosing frame around a door or window opening; "the
       casings had rotted away and had to be replaced" [syn:
       casing, case]