Source : Webster's Revised Unabridged Dictionary (1913)

Pig \Pig\, v. t. & i. [imp. & p. p. {Pigged}; p. pr. & vb. n.
   {Pigging}.]
   1. To bring forth (pigs); to bring forth in the manner of
      pigs; to farrow.

   2. To huddle or lie together like pigs, in one bed.

Pig \Pig\, n.
   A piggin. [Written also {pigg}.]

Pig \Pig\, n. [Cf. D. big, bigge, LG. bigge, also Dan. pige
   girl, Sw. piga, Icel. p[=i]ka.]
   1. The young of swine, male or female; also, any swine; a
      hog. ``Two pigges in a poke.'' --Chaucer.

   2. (Zo["o]l.) Any wild species of the genus {Sus} and related
      genera.

   3. [Cf. {Sow} a channel for melted iron.] An oblong mass of
      cast iron, lead, or other metal. See {Mine pig}, under
      {Mine}.

   4. One who is hoggish; a greedy person. [Low]

   {Masked pig}. (Zo["o]l.) See under {Masked}.

   {Pig bed} (Founding), the bed of sand in which the iron from
      a smelting furnace is cast into pigs.

   {Pig iron}, cast iron in pigs, or oblong blocks or bars, as
      it comes from the smelting furnace. See {Pig}, 4.

   {Pig yoke} (Naut.), a nickname for a quadrant or sextant.

   {A pig in a poke} (that is, bag), a blind bargain; something
      bought or bargained for, without the quality or the value
      being known. [Colloq.]

Source : WordNet®

pig
     n 1: domestic swine [syn: {hog}, {grunter}, {squealer}, {Sus
          scrofa}]
     2: a coarse obnoxious person [syn: {slob}, {sloven}, {slovenly
        person}]
     3: a person regarded as greedy and pig-like [syn: {hog}]
     4: uncomplimentary terms for a policeman [syn: {bull}, {cop}, {copper},
         {fuzz}]
     5: mold consisting of a bed of sand in which pig iron is cast
        [syn: {pig bed}]
     6: a crude block of metal (lead or iron) poured from a smelting
        furnace
     [also: {pigging}, {pigged}]

pig
     v 1: live like a pig, in squalor [syn: {pig it}]
     2: eat greedily; "he devoured three sandwiches" [syn: {devour},
         {guttle}, {raven}]
     3: give birth; "sows farrow" [syn: {farrow}]
     [also: {pigging}, {pigged}]