Source : Webster's Revised Unabridged Dictionary (1913)

Cock \Cock\, v. i.
   To strut; to swagger; to look big, pert, or menacing.
   --Addison.

Cock \Cock\, n.
   The act of cocking; also, the turn so given; as, a cock of
   the eyes; to give a hat a saucy cock.

Cock \Cock\, n. [It. cocca notch of an arrow.]
   1. The notch of an arrow or crossbow.

   2. The hammer in the lock of a firearm.

   {At cock}, {At full cock}, with the hammer raised and ready
      to fire; -- said of firearms, also, jocularly, of one
      prepared for instant action.

   {At half cock}. See under {Half}.

   {Cock feather} (Archery), the feather of an arrow at right
      angles to the direction of the cock or notch. --Nares.

Cock \Cock\, n. [AS. coc; of unknown origin, perh. in imitation
   of the cry of the cock. Cf. {Chicken}.]
   1. The male of birds, particularly of gallinaceous or
      domestic fowls.

   2. A vane in the shape of a cock; a weathercock.

            Drenched our steeples, drowned the cocks! --Shak.

   3. A chief man; a leader or master. [Humorous]

            Sir Andrew is the cock of the club, since he left
            us.                                   --Addison.

   4. The crow of a cock, esp. the first crow in the morning;
      cockcrow. [Obs.]

            He begins at curfew, and walks till the first cock.
                                                  --Shak.

   5. A faucet or valve.

   Note: Jonsons says, ``The handly probably had a cock on the
         top; things that were contrived to turn seem anciently
         to have had that form, whatever was the reason.''
         Skinner says, because it used to be constructed in
         forma crit[ae] galli, i.e., in the form of a cock's
         comb.

   6. The style of gnomon of a dial. --Chambers.

   7. The indicator of a balance. --Johnson.

   8. The bridge piece which affords a bearing for the pivot of
      a balance in a clock or watch. --Knight.

   {Ball cock}. See under {Ball}.

   {Chaparral cock}. See under {Chaparral}.

   {Cock and bull story}, {an extravagant}, boastful story; a
      canard.

   {Cock of the plains} (Zo["o]l.) See {Sage cock}.

   {Cock of the rock} (Zo["o]l.), a South American bird
      ({Rupicola aurantia}) having a beautiful crest.

   {Cock of the walk}, a chief or master; the hero of the hour;
      one who has overcrowed, or got the better of, rivals or
      competitors.

   {Cock of the woods}. See {Capercailzie}.

Cock \Cock\ (k[o^]k), v. t. [imp. & p. p. {Cocked} (k[o^]kt); p.
   pr. & vb. n. {Cocking}.] [Cf. Gael. coc to cock.]
   1. To set erect; to turn up.

            Our Lightfoot barks, and cocks his ears. --Gay.

            Dick would cock his nose in scorn.    --Swift.

   2. To shape, as a hat, by turning up the brim.

   3. To set on one side in a pert or jaunty manner.

            They cocked their hats in each other's faces.
                                                  --Macaulay.

   4. To turn (the eye) obliquely and partially close its lid,
      as an expression of derision or insinuation.

   {Cocked hat}.
      (a) A hat with large, stiff flaps turned up to a peaked
          crown, thus making its form triangular; -- called also
          {three-cornered hat}

Cock \Cock\, v. t.
   To draw the hammer of (a firearm) fully back and set it for
   firing.

Cock \Cock\, v. i.
   To draw back the hammer of a firearm, and set it for firing.

         Cocked, fired, and missed his man.       --Byron.

Cock \Cock\, n. [Cf. Icel. k["o]kkr lump, Dan. kok heap, or E.
   cock to set erect.]
   A small concial pile of hay.

Cock \Cock\, v. t.
   To put into cocks or heaps, as hay.

         Under the cocked hay.                    --Spenser.

Cock \Cock\, n. [Of. coque, F. coche, a small vessel, L. concha
   muscle shell, a vessel. See {Coach}, and cf. {Cog} a small
   boat.]
   A small boat.

         Yond tall anchoring bark [appears] Diminished to her
         cock; her cock, a buoy Almost too small for sight.
                                                  --Shak.

Cock \Cock\, n.
   A corruption or disguise of the word God, used in oaths.
   [Obs.] ``By cock and pie.'' --Shak.

Source : WordNet®

cock
     n 1: obscene terms for penis [syn: {prick}, {dick}, {shaft}, {pecker},
           {peter}, {tool}, {putz}]
     2: faucet consisting of a rotating device for regulating flow
        of a liquid [syn: {stopcock}, {turncock}]
     3: the part of a gunlock that strikes the percussion cap when
        the trigger is pulled [syn: {hammer}]
     4: adult male chicken [syn: {rooster}]
     5: adult male bird

cock
     v 1: tilt or slant to one side; "cock one's head"
     2: set the trigger of a firearm back for firing
     3: to walk with a lofty proud gait, often in an attempt to
        impress others; "He struts around like a rooster in a hen
        house" [syn: {swagger}, {ruffle}, {prance}, {strut}, {sashay}]