Source : Webster's Revised Unabridged Dictionary (1913)

Pit \Pit\, v. t. [imp. & p. p. {Pitted}; p. pr. & vb. n.
   {Pitting}.]
   1. To place or put into a pit or hole.

            They lived like beasts, and were pitted like beasts,
            tumbled into the grave.               --T. Grander.

   2. To mark with little hollows, as by various pustules; as, a
      face pitted by smallpox.

   3. To introduce as an antagonist; to set forward for or in a
      contest; as, to pit one dog against another.

Source : WordNet®

pit
     n 1: a sizeable hole (usually in the ground); "they dug a pit to
          bury the body" [syn: {cavity}]
     2: a concavity in a surface (especially an anatomical
        depression) [syn: {fossa}]
     3: the hard inner (usually woody) layer of the pericarp of some
        fruits (as peaches or plums or cherries or olives) that
        contains the seed; "you should remove the stones from
        prunes before cooking" [syn: {stone}, {endocarp}]
     4: a trap in the form of a concealed hole [syn: {pitfall}]
     5: a surface excavation for extracting stone or slate; "a
        British term for `quarry' is `stone pit'" [syn: {quarry},
        {stone pit}]
     6: lowered area in front of a stage where an orchestra
        accompanies the performers [syn: {orchestra pit}]
     7: a workplace consisting of a coal mine plus all the buildings
        and equipment connected with it [syn: {colliery}]
     [also: {pitting}, {pitted}]

pitting
     n : the formation of small pits in a surface as a consequence of
         corrosion [syn: {roughness}, {indentation}]

pit
     v 1: set into opposition or rivalry; "let them match their best
          athletes against ours"; "pit a chess player against the
          Russian champion"; "He plays his two children off
          against each other" [syn: {oppose}, {match}, {play off}]
     2: mark with a scar; "The skin disease scarred his face
        permanently" [syn: {scar}, {mark}, {pock}]
     3: remove the pits from; "pit plums and cherries" [syn: {stone}]
     [also: {pitting}, {pitted}]

pitting
     See {pit}