The Collaborative International Dictionary of English v.0.48:

Incorporation \In*cor`po*ra"tion\, n. [L. incorporatio: cf. F.
   incorporation.]
   [1913 Webster]
   1. The act of incorporating, or the state of being
      incorporated.
      [1913 Webster]

   2. The union of different ingredients in one mass; mixture;
      combination; synthesis.
      [1913 Webster]

   3. The union of something with a body already existing;
      association; intimate union; assimilation; as, the
      incorporation of conquered countries into the Roman
      republic.
      [1913 Webster]

   4. (Law)
      (a) The act of creating a corporation.
      (b) A body incorporated; a corporation.
          [1913 Webster]

WordNet (r) 3.0 (2006):

incorporation
    n 1: consolidating two or more things; union in (or into) one
         body
    2: learning (of values or attitudes etc.) that is incorporated
       within yourself [syn: internalization, internalisation,
       incorporation]
    3: including by incorporating