The Collaborative International Dictionary of English v.0.48:

Pluck \Pluck\, v. t. [imp. & p. p. Plucked; p. pr. & vb. n.
   Plucking.] [AS. pluccian; akin to LG. & D. plukken, G.
   pfl["u]cken, Icel. plokka, plukka, Dan. plukke, Sw. plocka.
   ?27.]
   1. To pull; to draw.
      [1913 Webster]

            Its own nature . . . plucks on its own dissolution.
                                                  --Je?. Taylor.
      [1913 Webster]

   2. Especially, to pull with sudden force or effort, or to
      pull off or out from something, with a twitch; to twitch;
      also, to gather, to pick; as, to pluck feathers from a
      fowl; to pluck hair or wool from a skin; to pluck grapes.
      [1913 Webster]

            I come to pluck your berries harsh and crude.
                                                  --Milton.
      [1913 Webster]

            E'en children followed, with endearing wile,
            And plucked his gown to share the good man's smile.
                                                  --Goldsmith.
      [1913 Webster]

   3. To strip of, or as of, feathers; as, to pluck a fowl.
      [1913 Webster]

            They which pass by the way do pluck her. --Ps.
                                                  lxxx.?2.
      [1913 Webster]

   4. (Eng. Universities) To reject at an examination for
      degrees. --C. Bront['e].
      [1913 Webster]

   To pluck away, to pull away, or to separate by pulling; to
      tear away.

   To pluck down, to pull down; to demolish; to reduce to a
      lower state.

   to pluck off, to pull or tear off; as, to pluck off the
      skin.

   to pluck up.
      (a) To tear up by the roots or from the foundation; to
          eradicate; to exterminate; to destroy; as, to pluck up
          a plant; to pluck up a nation. --Jer. xii. 17.
      (b) To gather up; to summon; as, to pluck up courage.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pluck \Pluck\, v. i.
   To make a motion of pulling or twitching; -- usually with at;
   as, to pluck at one's gown.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pluck \Pluck\, n.
   1. The act of plucking; a pull; a twitch.
      [1913 Webster]

   2. [Prob. so called as being plucked out after the animal is
      killed; or cf. Gael. & Ir. pluc a lump, a knot, a bunch.]
      The heart, liver, and lights of an animal.
      [1913 Webster]

   3. Spirit; courage; indomitable resolution; fortitude.
      [1913 Webster]

            Decay of English spirit, decay of manly pluck.
                                                  --Thackeray.
      [1913 Webster]

   4. The act of plucking, or the state of being plucked, at
      college. See Pluck, v. t., 4.
      [1913 Webster]

   5. (Zool.) The lyrie. [Prov. Eng.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lyrie \Ly"rie\ (l[imac]"r[i^]), n. [Icel. hl[=y]ri a sort of
   fish.] (Zool.)
   A European fish (Peristethus cataphractum), having the body
   covered with bony plates, and having three spines projecting
   in front of the nose; -- called also noble, pluck,
   pogge, sea poacher, and armed bullhead.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pluck
    n 1: the trait of showing courage and determination in spite of
         possible loss or injury [syn: gutsiness, pluck,
         pluckiness] [ant: gutlessness]
    2: the act of pulling and releasing a taut cord
    v 1: pull or pull out sharply; "pluck the flowers off the bush"
         [syn: pluck, tweak, pull off, pick off]
    2: sell something to or obtain something from by energetic and
       especially underhanded activity [syn: hustle, pluck,
       roll]
    3: rip off; ask an unreasonable price [syn: overcharge,
       soak, surcharge, gazump, fleece, plume, pluck,
       rob, hook] [ant: undercharge]
    4: pull lightly but sharply with a plucking motion; "he plucked
       the strings of his mandolin" [syn: pluck, plunk, pick]
    5: strip of feathers; "pull a chicken"; "pluck the capon" [syn:
       pluck, pull, tear, deplume, deplumate, displume]
    6: look for and gather; "pick mushrooms"; "pick flowers" [syn:
       pick, pluck, cull]