The Collaborative International Dictionary of English v.0.48:

Pigeon \Pi"geon\, n. [F., fr. L. pipio a young pipping or
   chirping bird, fr. pipire to peep, chirp. Cf. Peep to
   chirp.]
   1. (Zool.) Any bird of the order Columb[ae], of which
      numerous species occur in nearly all parts of the world.
      [1913 Webster]

   Note: The common domestic pigeon, or dove, was derived from
         the Old World rock pigeon or rock dove (Columba
         livia), common in cities. It has given rise to
         numerous very remarkable varieties, such as the
         carrier, fantail, nun, pouter, tumbler, etc. The common
         wild pigeon of the Eastern United States is the
         Mourning dove (Zenaida macroura, called also
         Carolina dove). Before the 19th century, the most
         common pigeon was the passenger pigeon, but that
         species is now extinct. See Passenger pigeon, and
         Carolina dove under Dove. See, also, Fruit
         pigeon, Ground pigeon, Queen pigeon, Stock
         pigeon, under Fruit, Ground, etc.
         [1913 Webster +PJC]

   2. An unsuspected victim of sharpers; a gull. [Slang]
      [1913 Webster]

   Blue pigeon (Zool.), an Australian passerine bird
      (Graucalus melanops); -- called also black-faced crow.


   Green pigeon (Zool.), any one of numerous species of Old
      World pigeons belonging to the family Treronid[ae].

   Imperial pigeon (Zool.), any one of the large Asiatic fruit
      pigeons of the genus Carpophada.

   Pigeon berry (Bot.), the purplish black fruit of the
      pokeweed; also, the plant itself. See Pokeweed.

   Pigeon English [perhaps a corruption of business English],
      an extraordinary and grotesque dialect, employed in the
      commercial cities of China, as the medium of communication
      between foreign merchants and the Chinese. Its base is
      English, with a mixture of Portuguese and Hindustani.
      --Johnson's Cyc.

   Pigeon grass (Bot.), a kind of foxtail grass (Setaria
      glauca), of some value as fodder. The seeds are eagerly
      eaten by pigeons and other birds.

   Pigeon hawk. (Zool.)
      (a) A small American falcon (Falco columbarius). The
          adult male is dark slate-blue above, streaked with
          black on the back; beneath, whitish or buff, streaked
          with brown. The tail is banded.
      (b) The American sharp-shinned hawk (Accipiter velox or
          Accipiter fuscus).

   Pigeon hole.
      (a) A hole for pigeons to enter a pigeon house.
      (b) See Pigeonhole.
      (c) pl. An old English game, in which balls were rolled
          through little arches. --Halliwell.

   Pigeon house, a dovecote.

   Pigeon pea (Bot.), the seed of Cajanus Indicus; a kind of
      pulse used for food in the East and West Indies; also, the
      plant itself.

   Pigeon plum (Bot.), the edible drupes of two West African
      species of Chrysobalanus (Chrysobalanus ellipticus and
      Chrysobalanus luteus).

   Pigeon tremex. (Zool.) See under Tremex.

   Pigeon wood (Bot.), a name in the West Indies for the wood
      of several very different kinds of trees, species of
      Dipholis, Diospyros, and Coccoloba.

   Pigeon woodpecker (Zool.), the flicker.

   Prairie pigeon. (Zool.)
      (a) The upland plover.
      (b) The golden plover. [Local, U.S.]
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pigeon \Pi"geon\, v. t.
   To pluck; to fleece; to swindle by tricks in gambling.
   [Slang] --Smart.
   [1913 Webster]

         He's pigeoned and undone.                --Observer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pigeon
    n 1: wild and domesticated birds having a heavy body and short
         legs

Moby Thesaurus II by Grady Ward, 1.0:

193 Moby Thesaurus words for "pigeon":
   Cornish hen, avifauna, babe, baby bird, bamboozle, beat, beguile,
   beguile of, betray, bilk, bird, bird of Jove, bird of Juno,
   bird of Minerva, bird of night, bird of passage, bird of prey,
   birdie, birdlife, birdy, bluff, boob, broiler, bunco, burn,
   cage bird, caille, cajole, canard, caneton, capon, chapon, cheat,
   cheat on, chick, chicken, chisel, chouse, chouse out of, chump,
   cinch, circumvent, cog, cog the dice, con, conjure, cozen,
   credulous person, crib, cull, cygnet, deceive, defraud, delude,
   diddle, dindon, diving bird, do in, do out of, double-cross, dove,
   duck, duckling, dupe, eagle, eaglet, easy mark, easy pickings,
   euchre, faisan, fall guy, finagle, fish, fish-eating bird, flam,
   fledgling, fleece, flightless bird, flimflam, fob, fool, forestall,
   fowl, fruit-eating bird, fryer, fudge, fulmar, game bird, gammon,
   get around, gobe-mouches, goose, gouge, greener, greenhorn, greeny,
   grouse, gudgeon, guff, guinea hen, gull, gyp, have, hoax, hocus,
   hocus-pocus, hornswaggle, humbug, innocent, insect-eating bird,
   juggle, leadpipe cinch, let down, mark, migrant, migratory bird,
   mock, monkey, mulct, nestling, oie, oscine bird, outmaneuver,
   outreach, outsmart, outwit, overreach, owl, pack the deal,
   partridge, passerine bird, patsy, peacock, peafowl, peahen,
   perching bird, pheasant, pigeonneau, play one false, plaything,
   poulet, practice fraud upon, prize sap, pushover,
   put something over, quail, ratite, roaster, rook, sap, saphead,
   scam, schlemiel, screw, sea bird, seed-eating bird,
   sell gold bricks, shave, shore bird, shortchange, sitting duck,
   snow, songbird, squab, stack the cards, stewing chicken, stick,
   sting, stooge, storm petrel, stormy petrel, string along, sucker,
   swan, swindle, take a dive, take in, thimblerig, throw a fight,
   toy, trick, trusting soul, turkey, two-time, victim, victimize,
   volaille, wading bird, warbler, water bird, waterfowl, wild duck,
   wildfowl



Easton's 1897 Bible Dictionary:

Pigeon
   Pigeons are mentioned as among the offerings which, by divine
   appointment, Abram presented unto the Lord (Gen. 15:9). They
   were afterwards enumerated among the sin-offerings (Lev. 1:14;
   12:6), and the law provided that those who could not offer a
   lamb might offer two young pigeons (5:7; comp. Luke 2:24). (See DOVE.)


U.S. Gazetteer Places (2000):

Pigeon, MI -- U.S. village in Michigan
   Population (2000):    1207
   Housing Units (2000): 518
   Land area (2000):     0.824359 sq. miles (2.135079 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.824359 sq. miles (2.135079 sq. km)
   FIPS code:            64060
   Located within:       Michigan (MI), FIPS 26
   Location:             43.829786 N, 83.271838 W
   ZIP Codes (1990):     48755
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Pigeon, MI
    Pigeon