The Collaborative International Dictionary of English v.0.48:

Stupefied \Stu"pe*fied\, a.
   Having been made stupid.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stupefy \Stu"pe*fy\, v. t. [imp. & p. p. Stupefied; p. pr. &
   vb. n. Stupefying.] [F. stup['e]fier, fr. L. stupere to be
   stupefied + ficare (in comp.) to make, akin to facere. See
   Stupid, Fact, and cf. Stupefacient.] [Written also
   stupify, especially in England.]
   1. To make stupid; to make dull; to blunt the faculty of
      perception or understanding in; to deprive of sensibility;
      to make torpid.
      [1913 Webster]

            The fumes of drink discompose and stupefy the brain.
                                                  --South.
      [1913 Webster]

   2. To deprive of material mobility. [Obs.]
      [1913 Webster]

            It is not malleable; but yet is not fluent, but
            stupefied.                            --Bacon.
      [1913 Webster]

WordNet (r) 3.0 (2006):

stupefied
    adj 1: as if struck dumb with astonishment and surprise; "a
           circle of policement stood dumbfounded by her denial of
           having seen the accident"; "the flabbergasted aldermen
           were speechless"; "was thunderstruck by the news of his
           promotion" [syn: dumbfounded, dumfounded,
           flabbergasted, stupefied, thunderstruck,
           dumbstruck, dumbstricken]
    2: in a state of mental numbness especially as resulting from
       shock; "he had a dazed expression on his face"; "lay
       semiconscious, stunned (or stupefied) by the blow"; "was
       stupid from fatigue" [syn: dazed, stunned, stupefied,
       stupid(p)]

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "stupefied":
   Laodicean, Olympian, agape, aghast, agog, all agog, aloof, amazed,
   apathetic, appalled, ashen, astonished, astounded, at gaze, awed,
   awestricken, awestruck, beguiled, benumbed, bewildered, bewitched,
   blah, blanched, blase, breathless, captivated, comatose,
   confounded, cowed, dazed, deadly pale, desensitized, detached,
   disinterested, dull, dumbfounded, dumbstruck, enchanted,
   enraptured, enravished, enthralled, entranced, fascinated,
   flabbergasted, frozen, gaping, gauping, gazing, gray with fear,
   heartless, hebetudinous, hopeless, horrified, horror-struck,
   hypnotized, in a stupor, in awe, in awe of, indifferent,
   insouciant, intimidated, languid, lethargic, listless,
   lost in wonder, marveling, mesmerized, nonchalant, numb, numbed,
   open-eyed, openmouthed, overwhelmed, pale as death, pallid,
   paralyzed, passive, petrified, phlegmatic, pluckless, popeyed,
   puzzled, rapt in wonder, resigned, scared stiff, scared to death,
   slack, sluggish, soporific, spellbound, spiritless, spunkless,
   staggered, staring, stoic, stunned, supine, surprised, terrified,
   terror-crazed, terror-haunted, terror-ridden, terror-riven,
   terror-shaken, terror-smitten, terror-struck, terror-troubled,
   thunderstruck, torpid, uncaring, unconcerned, under a charm,
   undone, uninterested, unmanned, unnerved, unstrung, wide-eyed,
   withdrawn, wonder-struck, wondering