The Collaborative International Dictionary of English v.0.48:

interweave \in`ter*weave"\, v. t. [imp. & obs. p. p.
   interwove; p. p. interwoven; p. pr. & vb. n.
   interweaving.]
   [1913 Webster]
   1. To weave together; to intermix or unite in texture or
      construction; to intertwine; as, threads of silk and
      cotton interwoven.
      [1913 Webster]

            Under the hospitable covert nigh
            Of trees thick interwoven.            --Milton.
      [1913 Webster]

   2. To intermingle; to unite intimately; to connect closely;
      as, to interweave truth with falsehood. --Dryden.
      [1913 Webster]

            Words interwove with sighs found out their way.
                                                  --Milton.
      [1913 Webster]

WordNet (r) 3.0 (2006):

interweave
    v 1: interlace by or as if by weaving [syn: weave,
         interweave] [ant: unweave]