資料來源 : Webster's Revised Unabridged Dictionary (1913)

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}.

資料來源 : WordNet®

witch grass
     n 1: North American grass with slender brushy panicles; often a
          weed on cultivated land [syn: {witchgrass}, {old
          witchgrass}, {old witch grass}, {tumble grass}, {Panicum
          capillare}]
     2: European grass spreading rapidly by creeping rhizomes;
        naturalized in North America as a weed [syn: {dog grass},
        {couch grass}, {quackgrass}, {quack grass}, {quick grass},
         {witchgrass}, {Agropyron repens}]