The Collaborative International Dictionary of English v.0.48:

Peck \Peck\, n. [Perh. akin to pack; or, orig., an indefinite
   quantity, and fr. peck, v. (below): cf. also F. picotin a
   peak.]
   1. The fourth part of a bushel; a dry measure of eight
      quarts; as, a peck of wheat. "A peck of provender."
      --Shak.
      [1913 Webster]

   2. A great deal; a large or excessive quantity. "A peck of
      uncertainties and doubts." --Milton.
      [1913 Webster] `

The Collaborative International Dictionary of English v.0.48:

Peck \Peck\, v. t. [imp. & p. p. Pecked (p[e^]kt); p. pr. &
   vb. n. Pecking.] [See Pick, v.]
   1. To strike with the beak; to thrust the beak into; as, a
      bird pecks a tree.
      [1913 Webster]

   2. Hence: To strike, pick, thrust against, or dig into, with
      a pointed instrument; especially, to strike, pick, etc.,
      with repeated quick movements.
      [1913 Webster]

   3. To seize and pick up with the beak, or as with the beak;
      to bite; to eat; -- often with up. --Addison.
      [1913 Webster]

            This fellow pecks up wit as pigeons peas. --Shak.
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   4. To make, by striking with the beak or a pointed
      instrument; as, to peck a hole in a tree.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Peck \Peck\, v. i.
   1. To make strokes with the beak, or with a pointed
      instrument. --Carew.
      [1913 Webster]

   2. To pick up food with the beak; hence, to eat.
      [1913 Webster]

            [The hen] went pecking by his side.   --Dryden.
      [1913 Webster]

   To peck at,
      (a) to attack with petty and repeated blows; to carp at;
          to nag; to tease.
      (a) to eat slowly and in small portions, with litle
          interest; as, to peck at one's food.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Peck \Peck\ (p[e^]k), n.
   A quick, sharp stroke, as with the beak of a bird or a
   pointed instrument.
   [1913 Webster]

WordNet (r) 3.0 (2006):

peck
    n 1: (often followed by `of') a large number or amount or
         extent; "a batch of letters"; "a deal of trouble"; "a lot
         of money"; "he made a mint on the stock market"; "see the
         rest of the winners in our huge passel of photos"; "it must
         have cost plenty"; "a slew of journalists"; "a wad of
         money" [syn: batch, deal, flock, good deal, great
         deal, hatful, heap, lot, mass, mess, mickle,
         mint, mountain, muckle, passel, peck, pile,
         plenty, pot, quite a little, raft, sight, slew,
         spate, stack, tidy sum, wad]
    2: a British imperial capacity measure (liquid or dry) equal to
       2 gallons
    3: a United States dry measure equal to 8 quarts or 537.605
       cubic inches
    v 1: hit lightly with a picking motion [syn: peck, pick,
         beak]
    2: eat by pecking at, like a bird [syn: peck, pick up]
    3: kiss lightly [syn: smack, peck]
    4: eat like a bird; "The anorexic girl just picks at her food"
       [syn: pick at, peck at, peck]
    5: bother persistently with trivial complaints; "She nags her
       husband all day long" [syn: nag, peck, hen-peck]