Source : Webster's Revised Unabridged Dictionary (1913)

Coop \Coop\ (k[=oo]p), n. [Cf. AS. cypa a measure, D. kuip tub,
   Icel. kupa bowl, G. kufe coop tub; all fr. L. cupa vat, tub,
   LL. cupa, copa, cup. See {Cup}, and cf. {Keeve}.]
   1. A barrel or cask for liquor. [Obs.] --Johnson.

   2. An inclosure for keeping small animals; a pen; especially,
      a grated box for confining poultry.

   3. A cart made close with boards; a tumbrel. [Scotch]

Coop \Coop\, v. t. [imp. & p. p. {Cooped}; p. pr. & vb. n.
   {Cooping}.]
   To confine in a coop; hence, to shut up or confine in a
   narrow compass; to cramp; -- usually followed by up,
   sometimes by in.

         The Trojans cooped within their walls so long.
                                                  --Dryden.

         The contempt of all other knowledge . . . coops the
         understanding up within narrow bounds.   --Locke.

   2. To work upon in the manner of a cooper. [Obs.] ``Shaken
      tubs . . . be new cooped.'' --Holland.

   Syn: To crowd; confine; imprison.

Source : WordNet®

coop
     n 1: a farm building for housing poultry [syn: {chicken coop}, {hencoop},
           {henhouse}]
     2: an enclosure made or wire or metal bars in which birds or
        animals are kept [syn: {cage}]