The Collaborative International Dictionary of English v.0.48:

Mutilate \Mu"ti*late\, a. [L. mutilatus, p. p. of mutilare to
   mutilate, fr. mutilus maimed; cf. Gr. ?, ?. Cf. Mutton.]
   1. Deprived of, or having lost, an important part; mutilated.
      --Sir T. Browne.
      [1913 Webster]

   2. (Zool.) Having finlike appendages or flukes instead of
      legs, as a cetacean.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mutilate \Mu"ti*late\, n. (Zool.)
   A cetacean, or a sirenian.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mutilate \Mu"ti*late\, v. t. [imp. & p. p. Mutilated; p. pr. &
   vb. n. Mutilating.]
   1. To cut off or remove a limb or essential part of; to maim;
      to cripple; to disfigure; to hack; as, to mutilate the
      body, a statue, etc.
      [1913 Webster]

   2. To destroy or remove a material part of, so as to render
      imperfect; as, to mutilate the orations of Cicero.
      [1913 Webster]

            Among the mutilated poets of antiquity, there is
            none whose fragments are so beautiful as those of
            Sappho.                               --Addison.
      [1913 Webster]

   Mutilated gear, Mutilated wheel (Mach.), a gear wheel
      from a portion of whose periphery the cogs are omitted. It
      is used for giving intermittent movements.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mutilate
    v 1: destroy or injure severely; "The madman mutilates art work"
         [syn: mutilate, mangle, cut up]
    2: alter so as to make unrecognizable; "The tourists murdered
       the French language" [syn: mangle, mutilate, murder]
    3: destroy or injure severely; "mutilated bodies" [syn:
       mutilate, mar]

Moby Thesaurus II by Grady Ward, 1.0:

132 Moby Thesaurus words for "mutilate":
   abrade, abscind, alter, amputate, annihilate, ban, bar, bark,
   blemish, bloody, bob, break, burn, butcher, castrate, chafe,
   change, check, chip, claw, clip, crack, craze, cripple, crop, cull,
   cut, cut away, cut off, cut out, damage, deface, defoliate, deform,
   denude, desexualize, destroy, disable, disfigure, dismember,
   disproportion, dock, draw and quarter, eliminate, enucleate,
   eradicate, except, excise, exclude, extinguish, extirpate, fix,
   flay, fracture, fray, frazzle, fret, gall, gash, geld, hurt,
   incise, injure, isolate, knock off, lacerate, lame, lop, maim,
   make mincemeat of, mangle, mar, maul, mayhem, misshape, neuter,
   nip, pare, peel, pick out, pick to pieces, pierce, prune,
   pull apart, puncture, rend, rip, rip off, root out, ruin, rule out,
   run, rupture, savage, scald, scorch, scotch, scrape, scratch,
   scuff, set apart, set aside, shave, shear, shred, skin, slash,
   slit, spoil, sprain, stab, stamp out, stick, strain, strike off,
   strip, strip off, take apart, take off, take out, tear, tear apart,
   tear off, tear to pieces, tear to tatters, traumatize, truncate,
   unsex, vandalize, wipe out, wound, wrench