The Collaborative International Dictionary of English v.0.48:

Disclaim \Dis*claim"\, v. t. [imp. & p. p. Disclaimed; p. pr.
   & vb. n. Disclaiming.]
   1. To renounce all claim to deny; ownership of, or
      responsibility for; to disown; to disavow; to reject.
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            He calls the gods to witness their offense;
            Disclaims the war, asserts his innocence. --Dryden.
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            He disclaims the authority of Jesus.  --Farmer.
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   2. To deny, as a claim; to refuse.
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            The payment was irregularly made, if not disclaimed.
                                                  --Milman.
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   3. (Law) To relinquish or deny having a claim; to disavow
      another's claim; to decline accepting, as an estate,
      interest, or office. --Burrill.

   Syn: To disown; disavow; renounce; repudiate.
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The Collaborative International Dictionary of English v.0.48:

Disclaim \Dis*claim"\, v. t.
   To disavow or renounce all part, claim, or share.
   --Blackstone.
   [1913 Webster]

   Disclaim in, Disclaim from, to disown; to disavow. [Obs.]
      "Nature disclaims in thee." --Shak.
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WordNet (r) 3.0 (2006):

disclaim
    v 1: renounce a legal claim or title to [ant: claim, take]
    2: make a disclaimer about; "He disclaimed any responsibility"
       [ant: claim]