The Collaborative International Dictionary of English v.0.48:

disqualified \dis*qual"i*fied\ (d[i^]s*kw[o^]l"[i^]*f[imac]d),
   adj.
   1. rendered ineligible by law or rule or provision; as,
      disqualified from voting.
      [WordNet 1.5]

   2. (Sports) barred from competition for violation of rules;
      as, a disqualified player.
      [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

disqualify \dis*qual"i*fy\ (d[i^]s*kw[o^]l"[i^]*f[imac]), v. t.
   [imp. & p. p. Disqualified (d[i^]s*kw[o^]l"[i^]*f[imac]d);
   p. pr. & vb. n. Disqualifying.]
   1. To deprive of the qualities or properties necessary for
      any purpose; to render unfit; to incapacitate; -- with for
      or from before the purpose, state, or act.
      [1913 Webster]

            My common illness disqualifies me for all
            conversation; I mean my deafness.     --Swift.
      [1913 Webster]

            Me are not disqualified by their engagements in
            trade from being received in high society.
                                                  --Southey.
      [1913 Webster]

   2. To deprive of some power, right, or privilege, by positive
      restriction; to disable; to debar legally; as, a
      conviction of perjury disqualifies a man to be a witness.
      [1913 Webster]

WordNet (r) 3.0 (2006):

disqualified
    adj 1: disqualified by law or rule or provision
    2: barred from competition for violation of rules; "a
       disqualified player"

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "disqualified":
   crippled, disabled, disarmed, hamstrung, hog-tied, ill-equipped,
   ill-fitted, ill-furnished, ill-provided, incapable, incapacitated,
   incompetent, ineligible, invalidated, paralyzed, prostrate,
   unadapted, unarmed, unequipped, unfit, unfitted, unprovided,
   unqualified, unsuited