The Collaborative International Dictionary of English v.0.48:

neighbor \neigh"bor\, v. t. [imp. & p. p. Neighbored; p. pr. &
   vb. n Neighboring.]
   1. To adjoin; to border on; to be near to.
      [1913 Webster]

            Leisurely ascending hills that neighbor the shore.
                                                  --Sandys.
      [1913 Webster]

   2. To associate intimately with. [Obs.] --Shak.
      [1913 Webster]