Source : Webster's Revised Unabridged Dictionary (1913)

Rook \Rook\, v. t. & i. [imp. & p. p. {Rooked}; p. pr. & vb. n.
   {Rooking}.]
   To cheat; to defraud by cheating. ``A band of rooking
   officials.'' --Milton.

Rook \Rook\ (r[oo^]k), n.
   Mist; fog. See {Roke}. [Obs.]

Rook \Rook\, v. i.
   To squat; to ruck. [Obs.] --Shak.

Rook \Rook\, n. [F. roc (cf. Sp. roque), fr. Per. & Ar. rokh, or
   rukh, the rook or castle at chess, also the bird roc (in this
   sense perhaps a different word); cf. Hind. rath a war
   chariot, the castle at chess, Skr. ratha a car, a war car.
   Cf. {Roll}.] (Chess)
   One of the four pieces placed on the corner squares of the
   board; a castle.

Rook \Rook\, n. [AS. hr[=o]c; akin to OHG. hruoh, ruoh, ruoho,
   Icel. hr[=o]kr, Sw. roka, Dan. raage; cf. Goth. hrukjan to
   crow.]
   1. (Zo["o]l.) A European bird ({Corvus frugilegus})
      resembling the crow, but smaller. It is black, with purple
      and violet reflections. The base of the beak and the
      region around it are covered with a rough, scabrous skin,
      which in old birds is whitish. It is gregarious in its
      habits. The name is also applied to related Asiatic
      species.

            The rook . . . should be treated as the farmer's
            friend.                               --Pennant.

   2. A trickish, rapacious fellow; a cheat; a sharper.
      --Wycherley.

Source : WordNet®

rook
     n 1: (chess) the piece that can move any number of unoccupied
          squares in a direction parallel to the sides of the
          chessboard [syn: {castle}]
     2: common gregarious Old World bird about the size and color of
        the American crow [syn: {Corvus frugilegus}]
     v : deprive of by deceit; "He swindled me out of my
         inheritance"; "She defrauded the customers who trusted
         her"; "the cashier gypped me when he gave me too little
         change" [syn: {victimize}, {swindle}, {goldbrick}, {nobble},
          {diddle}, {bunco}, {defraud}, {scam}, {mulct}, {gyp}, {con}]