The Collaborative International Dictionary of English v.0.48:

Revoke \Re*voke"\, v. i. (Card Playing)
   To fail to follow suit when holding a card of the suit led,
   in violation of the rule of the game; to renege. --Hoyle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Revoke \Re*voke"\, v. t. [imp. & p. p. Revoked;p. pr. & vb. n.
   Revoking.] [F. r['e]voquer, L. revocare; pref. re- re- +
   vocare to call, fr. vox, vocis, voice. See Voice, and cf.
   Revocate.]
   1. To call or bring back; to recall. [Obs.]
      [1913 Webster]

            The faint sprite he did revoke again,
            To her frail mansion of morality.     --Spenser.
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   2. Hence, to annul, by recalling or taking back; to repeal;
      to rescind; to cancel; to reverse, as anything granted by
      a special act; as,, to revoke a will, a license, a grant,
      a permission, a law, or the like. --Shak.
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   3. To hold back; to repress; to restrain. [Obs.]
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            [She] still strove their sudden rages to revoke.
                                                  --Spenser.
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   4. To draw back; to withdraw. [Obs.] --Spenser.
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   5. To call back to mind; to recollect. [Obs.]
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            A man, by revoking and recollecting within himself
            former passages, will be still apt to inculcate
            these sad memoris to his conscience.  --South.
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   Syn: To abolish; recall; repeal; rescind; countermand; annul;
        abrogate; cancel; reverse. See Abolish.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Revoke \Re*voke"\, n. (Card Playing)
   The act of revoking.
   [1913 Webster]

         She [Sarah Battle] never made a revoke.  --Lamb.
   [1913 Webster]

WordNet (r) 3.0 (2006):

revoke
    n 1: the mistake of not following suit when able to do so [syn:
         revoke, renege]
    v 1: fail to follow suit when able and required to do so
    2: cancel officially; "He revoked the ban on smoking"; "lift an
       embargo"; "vacate a death sentence" [syn: revoke, annul,
       lift, countermand, reverse, repeal, overturn,
       rescind, vacate]

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "revoke":
   abjure, abolish, abrogate, annihilate, annul, assert the contrary,
   back down, back out, backwater, belie, bring to naught, cancel,
   cite, climb down, contest, contradict, contravene, controvert,
   counter, countermand, counterorder, crawfish out, cross, deny,
   disaffirm, disallow, disannul, disavow, disclaim, dismantle,
   disown, disprove, dispute, do away with, eat crow, eat humble pie,
   erase, expunge, forswear, gainsay, impugn, invalidate,
   join issue upon, lift, make void, negate, negative, not accept,
   not admit, nullify, oppose, override, overrule, quash, recall,
   recant, recollect, refuse to admit, refute, remember, remind,
   reminisce, renege, renounce, repeal, repudiate, rescind, retain,
   retract, retrospect, reverse, revive, set aside, suspend, swallow,
   take back, take issue with, undo, unsay, vacate, veto, void, waive,
   withdraw, write off