Source : Webster's Revised Unabridged Dictionary (1913)

Witch \Witch\, n. [Cf. {Wick} of a lamp.]
   A cone of paper which is placed in a vessel of lard or other
   fat, and used as a taper. [Prov. Eng.]

Witch \Witch\, n. [OE. wicche, AS. wicce, fem., wicca, masc.;
   perhaps the same word as AS. w[=i]tiga, w[=i]tga, a
   soothsayer (cf. {Wiseacre}); cf. Fries. wikke, a witch, LG.
   wikken to predict, Icel. vitki a wizard, vitka to bewitch.]
   1. One who practices the black art, or magic; one regarded as
      possessing supernatural or magical power by compact with
      an evil spirit, esp. with the Devil; a sorcerer or
      sorceress; -- now applied chiefly or only to women, but
      formerly used of men as well.

            There was a man in that city whose name was Simon, a
            witch.                                --Wyclif (Acts
                                                  viii. 9).

            He can not abide the old woman of Brentford; he
            swears she's a witch.                 --Shak.

   2. An ugly old woman; a hag. --Shak.

   3. One who exercises more than common power of attraction; a
      charming or bewitching person; also, one given to
      mischief; -- said especially of a woman or child.
      [Colloq.]

   4. (Geom.) A certain curve of the third order, described by
      Maria Agnesi under the name versiera.

   5. (Zo["o]l.) The stormy petrel.

   {Witch balls}, a name applied to the interwoven rolling
      masses of the stems of herbs, which are driven by the
      winds over the steppes of Tartary. Cf. {Tumbleweed}.
      --Maunder (Treas. of Bot.)

   {Witches' besoms} (Bot.), tufted and distorted branches of
      the silver fir, caused by the attack of some fungus.
      --Maunder (Treas. of Bot.)

   {Witches' butter} (Bot.), a name of several gelatinous
      cryptogamous plants, as {Nostoc commune}, and {Exidia
      glandulosa}. See {Nostoc}.

   {Witch grass} (Bot.), a kind of grass ({Panicum capillare})
      with minute spikelets on long, slender pedicels forming a
      light, open panicle.

   {Witch meal} (Bot.), vegetable sulphur. See under
      {Vegetable}.

Witch \Witch\, v. t. [imp. & p. p. {Witched}; p. pr. & vb. n.
   {Witching}.] [AS. wiccian.]
   To bewitch; to fascinate; to enchant.

         [I 'll] witch sweet ladies with my words and looks.
                                                  --Shak.

         Whether within us or without The spell of this illusion
         be That witches us to hear and see.      --Lowell.

Source : WordNet®

witch
     v : cast a spell over someone or something; put a hex on someone
         or something [syn: {hex}, {bewitch}, {glamour}, {enchant},
          {jinx}]

witch
     n 1: a female sorcerer or magician [syn: {enchantress}]
     2: a being (usually female) imagined to have special powers
        derived from the devil
     3: an ugly evil-looking old woman [syn: {hag}, {beldam}, {beldame},
         {crone}]