The Collaborative International Dictionary of English v.0.48:

Pot \Pot\, n. [Akin to LG. pott, D. pot, Dan. potte, Sw. potta,
   Icel. pottr, F. pot; of unknown origin.]
   1. A metallic or earthen vessel, appropriated to any of a
      great variety of uses, as for boiling meat or vegetables,
      for holding liquids, for plants, etc.; as, a quart pot; a
      flower pot; a bean pot.
      [1913 Webster]

   2. An earthen or pewter cup for liquors; a mug.
      [1913 Webster]

   3. The quantity contained in a pot; a potful; as, a pot of
      ale. "Give her a pot and a cake." --De Foe.
      [1913 Webster]

   4. A metal or earthenware extension of a flue above the top
      of a chimney; a chimney pot.
      [1913 Webster]

   5. A crucible; as, a graphite pot; a melting pot.
      [1913 Webster]

   6. A wicker vessel for catching fish, eels, etc.
      [1913 Webster]

   7. A perforated cask for draining sugar. --Knight.
      [1913 Webster]

   8. A size of paper. See Pott.
      [1913 Webster]

   9. marijuana. [slang]
      [PJC]

   10. The total of the bets at stake at one time, as in racing
       or card playing; the pool; also (Racing, Eng.) a horse
       heavily backed; a favorite. [Slang]
       [Webster 1913 Suppl.]

   11. (Armor) A plain defensive headpiece; later, and perhaps
       in a jocose sense, any helmet; -- called also pot
       helmet.
       [Webster 1913 Suppl.]

   12. (Card Playing) The total of the bets at one time; the
       pool.
       [Webster 1913 Suppl.]

   Jack pot. See under 2d Jack.

   Pot cheese, cottage cheese. See under Cottage.

   Pot companion, a companion in drinking.

   Pot hanger, a pothook.

   Pot herb, any plant, the leaves or stems of which are
      boiled for food, as spinach, lamb's-quarters, purslane,
      and many others.

   Pot hunter, one who kills anything and everything that will
      help to fill has bag; also, a hunter who shoots game for
      the table or for the market.

   Pot metal.
       (a) The metal from which iron pots are made, different
           from common pig iron.
       (b) An alloy of copper with lead used for making large
           vessels for various purposes in the arts. --Ure.
       (c) A kind of stained glass, the colors of which are
           incorporated with the melted glass in the pot.
           --Knight.

   Pot plant (Bot.), either of the trees which bear the
      monkey-pot.

   Pot wheel (Hydraul.), a noria.

   To go to pot, to go to destruction; to come to an end of
      usefulness; to become refuse. [Colloq.] --Dryden. --J. G.
      Saxe.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pot metal
    n 1: cast iron used for making cooking wares
    2: an alloy of copper and lead used especially for making large
       pots