[1] : The Collaborative International Dictionary of English v.0.48

dizzy \diz"zy\ di^z"zy^, a. compar. dizzier
   di^z"zi^~er; superl. dizziest. oe. dusi, disi,
   desi, foolish, as. dysig; akin to lg. d"usig dizzy, od.
   deuzig, duyzig, ohg. tusig foolish, ofries. dusia to be
   dizzy; lg. dusel dizziness, duselig, dusselig, d. duizelig,
   dizzy, dan. d"osig drowsy, slepy, d"ose to make dull,
   drowsy, d"os dullness, drowsiness, and to as. dw=aes
   foolish, g. thor fool. root71. cf. daze, doze.
   1. having in the head a sensation of whirling, with a
      tendency to fall; vertiginous; giddy; hence, confused;
      indistinct.
      1913 webster

            alas his brain was dizzy.            --drayton.
      1913 webster

   2. causing, or tending to cause, giddiness or vertigo.
      1913 webster

            to climb from the brink of fleet ditch by a dizzy
            ladder.                               --macaulay.
      1913 webster

   3. without distinct thought; unreflecting; thoughtless;
      heedless. "the dizzy multitude." --milton.
      1913 webster
see also:
dizzier dizziest daze doze 

[2] : The Collaborative International Dictionary of English v.0.48

dizzy \diz"zy\, v. t. imp.  p. p. dizzied; p. pr.  vb. n.
   dizzying.
   to make dizzy or giddy; to give the vertigo to; to confuse.
   1913 webster

         if the jangling of thy bells had not dizzied thy
         understanding.                           --sir w.
                                                  scott.
see also:
dizzied dizzying 

[3] : WordNet (r) 2.0

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
     v : make dizzy or giddy; "a dizzying pace"
     also: dizzied, dizziest, dizzier
see also:
giddy woozy vertiginous airheaded empty-headed featherbrained 
light-headed lightheaded silly dizzied dizziest 
dizzier 

[4] : Moby Thesaurus II by Grady Ward, 1.0

226 moby thesaurus words for "dizzy":
   addle, addlebrained, addled, addleheaded, addlepated, adrift,
   afloat, alternating, amorphous, apish, asinine, babbling, ball up,
   batty, beery, befooled, befuddle, befuddled, beguiled, bemused,
   besotted, bewilder, bewildered, blear-witted, blind drunk,
   brainless, buffoonish, capricious, cause vertigo, changeable,
   changeful, cockeyed, confounded, confused, crapulent, crapulous,
   crazy, credulous, daffy, daft, dazed, dazzled, delirious,
   desultory, deviable, distracted, doting, drenched, drunk, drunken,
   dumb, eccentric, empty-headed, erratic, exorbitant, extravagant,
   extreme, faint, far-gone, fast and loose, fatuitous, fatuous,
   featherbrained, featherheaded, fickle, fitful, flaky, flickering,
   flighty, flitting, fluctuating, fluster, flustered, fluttery,
   foggy, fond, fool, foolheaded, foolish, fou, freakish, frivolous,
   fuddle, fuddlebrained, fuddled, full, futile, gaga, gay, giddy,
   giddy-brained, giddy-headed, giddy-pated, giddy-witted, glorious,
   goofy, gulled, happy, harebrain, harebrained, idiotic, imbecile,
   immoderate, impetuous, impulsive, in liquor, inane, incoherent,
   inconsistent, inconstant, indecisive, inebriate, inebriated,
   inebrious, inept, infatuated, infirm, inordinate, insane,
   intoxicate, intoxicated, irregular, irresolute, irresponsible,
   jolly, kooky, light, light-headed, lightheaded, loony, mad,
   maudlin, mazy, mellow, mercurial, merry, mix up, moody, moronic,
   muddle, muddled, muddleheaded, muddybrained, muzzy, nappy, nutty,
   off, puzzled, puzzleheaded, rambling, ranting, rattlebrained,
   rattleheaded, rattlepated, raving, reeling, restless, roving,
   sappy, scatterbrained, scramblebrained, screwy, senseless,
   sentimental, shapeless, shatterbrained, shifting, shifty, shikker,
   shuffling, silly, skittish, sodden, sotted, spasmodic, spineless,
   stupid, swimming, swirl the senses, thoughtless, throw off, tiddly,
   tipsy, tottering, towering, turned around, unaccountable,
   uncertain, unconscionable, uncontrolled, undependable,
   under the influence, undisciplined, undue, unfixed, unmeasurable,
   unpredictable, unreliable, unrestrained, unsettled, unstable,
   unstable as water, unstaid, unsteadfast, unsteady, vacillating,
   vagrant, variable, vertiginous, vicissitudinary, vicissitudinous,
   volatile, wacky, wandering, wanton, wavering, wavery, wavy,
   wayward, wet, whimsical, whirl the mind, whirling, wishy-washy,
   witless, woozy

Dizzy >> D Words
Dizzy, definition of term: Dizzy
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