The Collaborative International Dictionary of English v.0.48:

Mock \Mock\, v. t. [imp. & p. p. Mocked; p. pr. & vb. n.
   Mocking.] [F. moquer, of uncertain origin; cf. OD. mocken
   to mumble, G. mucken, OSw. mucka.]
   1. To imitate; to mimic; esp., to mimic in sport, contempt,
      or derision; to deride by mimicry.
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            To see the life as lively mocked as ever
            Still sleep mocked death.             --Shak.
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            Mocking marriage with a dame of France. --Shak.
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   2. To treat with scorn or contempt; to deride.
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            Elijah mocked them, and said, Cry aloud. --1 Kings
                                                  xviii. 27.
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            Let not ambition mock their useful toil. --Gray.
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   3. To disappoint the hopes of; to deceive; to tantalize; as,
      to mock expectation.
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            Thou hast mocked me, and told me lies. --Judg. xvi.
                                                  13.
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            He will not . . .
            Mock us with his blest sight, then snatch him hence.
                                                  --Milton.
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   Syn: To deride; ridicule; taunt; jeer; tantalize; disappoint.
        See Deride.
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The Collaborative International Dictionary of English v.0.48:

Mocking \Mock"ing\, a.
   Imitating, esp. in derision, or so as to cause derision;
   mimicking; derisive.
   [1913 Webster]

   Mocking thrush (Zool.), any species of the genus
      Harporhynchus, as the brown thrush (Harporhynchus
      rufus).

   Mocking wren (Zool.), any American wren of the genus
      Thryothorus, esp. Thryothorus Ludovicianus.
      [1913 Webster] mockingbird

WordNet (r) 3.0 (2006):

mocking
    adj 1: abusing vocally; expressing contempt or ridicule;
           "derisive laughter"; "a jeering crowd"; "her mocking
           smile"; "taunting shouts of `coward' and `sissy'" [syn:
           derisive, gibelike, jeering, mocking, taunting]
    2: playfully vexing (especially by ridicule); "his face wore a
       somewhat quizzical almost impertinent air"- Lawrence Durrell
       [syn: mocking, teasing, quizzical]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "mocking":
   adoption, appropriation, assumption, bantering, booing,
   borrowed plumes, catcalling, chaffing, copying, derisive, derisory,
   derivation, deriving, fleering, flippant, fooling, grinning,
   hissing, hooting, imitation, infringement, jeering, joshing,
   kidding, leering, panning, pasticcio, pastiche, pirating,
   plagiarism, plagiary, quizzical, ragging, railing, rallying,
   razzing, ridiculing, roasting, scoffing, simulation, smart,
   smart-alecky, smart-ass, smirking, sneering, snickering,
   sniggering, snorting, taking, taunting, teasing, twitting