DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Interleave \In`ter*leave"\, v. t. [imp. & p. p. Interleaved;
      p. pr. & vb. n. Interleaving.] [Pref. inter- + leaf.]
      1. To insert a leaf or leaves in; to bind with blank leaves
         inserted between the others; as, to interleave a book.
         [1913 Webster]
      2. Hence: To insert something alternately between the parts
         of; as, to interleave transparencies with the
         corresponding pages.
         [PJC]