Source : Webster's Revised Unabridged Dictionary (1913)

Pitch \Pitch\, v. t. [imp. & p. p. {Pitched}; p. pr. & vb. n.
   {Pitching}.] [See {Pitch}, n.]
   1. To cover over or smear with pitch. --Gen. vi. 14.

   2. Fig.: To darken; to blacken; to obscure.

            The welkin pitched with sullen could. --Addison.

Pitching \Pitch"ing\, n.
   1. The act of throwing or casting; a cast; a pitch; as, wild
      pitching in baseball.

   2. The rough paving of a street to a grade with blocks of
      stone. --Mayhew.

   3. (Hydraul. Eng.) A facing of stone laid upon a bank to
      prevent wear by tides or currents.

   {Pitching piece} (Carp.), the horizontal timber supporting
      the floor of a platform of a stairway, and against which
      the stringpieces of the sloping parts are supported.

Source : WordNet®

pitching
     n 1: (baseball) playing the position of pitcher on a baseball
          team
     2: abrupt up-and-down motion (as caused by a ship or other
        conveyance); "the pitching and tossing was quite exciting"
        [syn: {lurch}, {pitch}]