The Collaborative International Dictionary of English v.0.48:

disassemble \dis`as*sem"ble\ v. t.
   1. to take apart; to disconnect the parts of; to convert a
      whole into its constituent pieces.

   Syn: dismantle, take apart, break apart, break up. [PJC]

   2. (Computers) to convert a computer program in machine
      language into an equivalent assembly-language file.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

disassemble \dis`as*sem"ble\ v. i.
   to be able to come apart easily; to be converted into
   constituent parts; as, the rifle disassembles into small
   pieces for concealment.
   [PJC]

WordNet (r) 3.0 (2006):

disassemble
    v 1: take apart into its constituent pieces [syn: disassemble,
         dismantle, take apart, break up, break apart] [ant:
         assemble, piece, put together, set up, tack,
         tack together]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "disassemble":
   atomize, break to pieces, cleave, demolish, disintegrate,
   dismantle, dismember, dismount, fragment, make mincemeat of,
   pick to pieces, pull in pieces, pull to pieces, pulverize,
   reduce to rubble, rend, shatter, smash, split, sunder, take apart,
   take down, tear apart, tear down, tear to pieces, tear to shreds,
   tear to tatters, total, unbuild, undo, unmake, wrack up, wreck