Source : Webster's Revised Unabridged Dictionary (1913)

Pitcher \Pitch"er\, n. [OE. picher, OF. pichier, OHG. pehhar,
   pehh[=a]ri; prob. of the same origin as E. beaker. Cf.
   {Beaker}.]
   1. A wide-mouthed, deep vessel for holding liquids, with a
      spout or protruding lip and a handle; a water jug or jar
      with a large ear or handle.

   2. (Bot.) A tubular or cuplike appendage or expansion of the
      leaves of certain plants.

   {American pitcher plants}, the species of Sarracenia. See
      {Sarracenia}.

   {Australian pitcher plant}, the {Cephalotus follicularis}, a
      low saxifragaceous herb having two kinds of radical
      leaves, some oblanceolate and entire, others transformed
      into little ovoid pitchers, longitudinally triple-winged
      and ciliated, the mouth covered with a lid shaped like a
      cockleshell.

   {California pitcher plant}, the {Darlingtonia California}.
      See {Darlingtonia}.

   {Pitcher plant}, any plant with the whole or a part of the
      leaves transformed into pitchers or cuplike organs,
      especially the species of {Nepenthes}. See {Nepenthes}.

Source : WordNet®

pitcher plant
     n : any of several insectivorous herbs of the order
         Sarraceniales