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

Dizzy \Diz"zy\ (d[i^]z"z[y^]), a. [Compar. {Dizzier}
   (-z[i^]*[~e]r); superl. {Dizziest}.] [OE. dusi, disi, desi,
   foolish, AS. dysig; akin to LG. d["u]sig dizzy, OD. deuzig,
   duyzig, OHG. tusig foolish, OFries. dusia to be dizzy; LG.
   dusel dizziness, duselig, dusselig, D. duizelig, dizzy, Dan.
   d["o]sig drowsy, slepy, d["o]se to make dull, drowsy, d["o]s
   dullness, drowsiness, and to AS. dw[=ae]s foolish, G. thor
   fool. [root]71. Cf. {Daze}, {Doze}.]
   1. Having in the head a sensation of whirling, with a
      tendency to fall; vertiginous; giddy; hence, confused;
      indistinct.

            Alas! his brain was dizzy.            --Drayton.

   2. Causing, or tending to cause, giddiness or vertigo.

            To climb from the brink of Fleet Ditch by a dizzy
            ladder.                               --Macaulay.

   3. Without distinct thought; unreflecting; thoughtless;
      heedless. ``The dizzy multitude.'' --Milton.

資料來源 : WordNet®

dizzy
     v : make dizzy or giddy; "a dizzying pace"
     [also: {dizzied}, {dizziest}, {dizzier}]

dizzy
     adj 1: having or causing a whirling sensation; liable to falling;
            "had a dizzy spell"; "a dizzy pinnacle"; "had a
            headache and felt giddy"; "a giddy precipice";
            "feeling woozy from the blow on his head"; "a
            vertiginous climb up the face of the cliff" [syn: {giddy},
             {woozy}, {vertiginous}]
     2: lacking seriousness; given to frivolity; "a dizzy blonde";
        "light-headed teenagers"; "silly giggles" [syn: {airheaded},
         {empty-headed}, {featherbrained}, {giddy}, {light-headed},
         {lightheaded}, {silly}]
     [also: {dizzied}, {dizziest}, {dizzier}]

dizziest
     See {dizzy}