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]