The Collaborative International Dictionary of English v.0.48:

Annul \An*nul"\, v. t. [imp. & p. p. Annulled; p. pr. & vb. n.
   Annulling.] [F. annuler, LL. annullare, annulare, fr. L. ad
   to + nullus none, nullum, neut., nothing. See Null, a.]
   1. To reduce to nothing; to obliterate.
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            Light, the prime work of God, to me's extinct.
            And all her various objects of delight
            Annulled.                             --Milton.
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   2. To make void or of no effect; to nullify; to abolish; to
      do away with; -- used appropriately of laws, decrees,
      edicts, decisions of courts, or other established rules,
      permanent usages, and the like, which are made void by
      component authority.
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            Do they mean to annul laws of inestimable value to
            our liberties?                        --Burke.
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   Syn: To abolish; abrogate; repeal; cancel; reverse; rescind;
        revoke; nullify; destroy. See Abolish.
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