The Collaborative International Dictionary of English v.0.48:

Disenchant \Dis`en*chant"\, v. t. [imp. & p. p. Disenchanted;
   p. pr. & vb. n. Disenchanting.] [Pref. dis- + enchant: cf.
   F. d['e]senchanter.]
   1. To free from enchantment; to deliver from the power of
      charms or spells.
      [1913 Webster]

            Haste to thy work; a noble stroke or two
            Ends all the charms, and disenchants the grove.
                                                  --Dryden.
      [1913 Webster]

   2. to free (a person) from fascination or delusion; to
      destroy the false hopes or overoptimistic expectations of
      (a person); to disillusion; -- used with people or events
      as the agent (subject); as, the candidate was disenchanted
      by the low turnout at the rally.
      [PJC]

WordNet (r) 3.0 (2006):

disenchanted
    adj 1: freed from enchantment [ant: enchanted]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "disenchanted":
   against, allergic, averse, blase, con, cynical, disabused,
   disaffected, disappointed, disapprobatory, disapproving,
   discontented, disgruntled, disillusioned, disinclined, displeased,
   dissatisfied, dissenting, enlightened, hostile, indifferent,
   indignant, jaundiced, knowing, low, mondaine, not charmed, opposed,
   opposing, poor, put off, put straight, robbed of illusion,
   set right, sophisticate, sophisticated, soured, turned-off,
   unappreciative, unapproving, uncharmed, uncomplimentary,
   undeceived, unfavorable, unfriendly, unhappy, unspelled,
   world-wise, worldly, worldly-wise