Source : Webster's Revised Unabridged Dictionary (1913)

Crook \Crook\ (kr??k), v. t. [imp. & p. p. {Crooked} (kr??kt);
   p. pr. & vb. n. {Crooking}.] [OE. croken; cf. Sw. kr?ka, Dan.
   kr?ge. See Crook, n.]
   1. To turn from a straight line; to bend; to curve.

            Crook the pregnant hinges of the knee. --Shak.

   2. To turn from the path of rectitude; to pervert; to
      misapply; to twist. [Archaic]

            There is no one thing that crooks youth more than
            such unlawfull games.                 --Ascham.

            What soever affairs pass such a man's hands, he
            crooketh them to his own ends.        --Bacon.

Crook \Crook\ (kr[oo^]k), n. [OE. crok; akin to Icel. kr[onac]kr
   hook, bend, SW. krok, Dan. krog, OD. krooke; or cf. Gael.
   crocan crook, hook, W. crwca crooked. Cf. {Crosier},
   {Crotchet}, {Crutch}, {Encroach}.]
   1. A bend, turn, or curve; curvature; flexure.

            Through lanes, and crooks, and darkness. --Phaer.

   2. Any implement having a bent or crooked end. Especially:
      (a) The staff used by a shepherd, the hook of which serves
          to hold a runaway sheep.
      (b) A bishop's staff of office. Cf. {Pastoral staff}.

                He left his crook, he left his flocks. --Prior.

   3. A pothook. ``As black as the crook.'' --Sir W. Scott.

   4. An artifice; trick; tricky device; subterfuge.

            For all yuor brags, hooks, and crooks. --Cranmer.

   5. (Mus.) A small tube, usually curved, applied to a trumpet,
      horn, etc., to change its pitch or key.

   6. A person given to fraudulent practices; an accomplice of
      thieves, forgers, etc. [Cant, U.S.]

   {By hook or by crook}, in some way or other; by fair means or
      foul.

Crook \Crook\, v. i.
   To bend; to curve; to wind; to have a curvature. `` The port
   . . . crooketh like a bow.'' --Phaer.

         Their shoes and pattens are snouted, and piked more
         than a finger long, crooking upwards.    --Camden.

Source : WordNet®

crook
     n 1: someone who has committed (or been legally convicted of) a
          crime [syn: {criminal}, {felon}, {outlaw}, {malefactor}]
     2: a circular segment of a curve; "a bend in the road"; "a
        crook in the path" [syn: {bend}, {turn}]
     3: a long staff with one end being hook shaped [syn: {shepherd's
        crook}]

crook
     v : bend or cause to bend; "He crooked his index finger"; "the
         road curved sharply" [syn: {curve}]