The Collaborative International Dictionary of English v.0.48:

Acquit \Ac*quit"\, v. t. [imp. & p. p. Acquitted; p. pr. & vb.
   n. Acquitting.] [OE. aquiten, OF. aquiter, F. acquitter; ?
   (L. ad) + OF. quiter, F. quitter, to quit. See Quit, and
   cf. Acquiet.]
   1. To discharge, as a claim or debt; to clear off; to pay
      off; to requite.
      [1913 Webster]

            A responsibility that can never be absolutely
            acquitted.                            --I. Taylor.
      [1913 Webster]

   2. To pay for; to atone for. [Obs.] --Shak.
      [1913 Webster]

   3. To set free, release or discharge from an obligation,
      duty, liability, burden, or from an accusation or charge;
      -- now followed by of before the charge, formerly by from;
      as, the jury acquitted the prisoner; we acquit a man of
      evil intentions.
      [1913 Webster]

   4. Reflexively:
      (a) To clear one's self. --Shak.
      (b) To bear or conduct one's self; to perform one's part;
          as, the soldier acquitted himself well in battle; the
          orator acquitted himself very poorly.
          [1913 Webster]

   Syn: To absolve; clear; exonerate; exonerate; exculpate;
        release; discharge. See Absolve.
        [1913 Webster]

WordNet (r) 3.0 (2006):

acquitted
    adj 1: declared not guilty of a specific offense or crime;
           legally blameless; "he stands acquitted on all charges";
           "the jury found him not guilty by reason of insanity"
           [syn: acquitted, not guilty]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "acquitted":
   absolved, blotted, canceled, condoned, discharged, disregarded,
   exculpated, excused, exonerated, expended, forgiven, forgotten,
   hired, indulged, liquidated, overlooked, paid, paid in full,
   pardoned, postpaid, prepaid, receipted, redeemed, remitted,
   reprieved, salaried, settled, shriven, spared, spent, unavenged,
   uncondemned, unresented, unrevenged, waged, wiped away