The Collaborative International Dictionary of English v.0.48:

Overpass \O`ver*pass"\, v. t. [imp. & p. p. Overpassed; p. pr.
   & vb. n. Overpassing.] [Cf. Surpass.]
   [1913 Webster]
   1. To go over or beyond; to cross; as, to overpass a river;
      to overpass limits.
      [1913 Webster]

   2. To pass above; -- of roadways and other paths; as, the
      highway overpasses the railroad tracks.
      [PJC]

   3. To pass over; to omit; to overlook; to disregard.
      [1913 Webster]

            All the beauties of the East
            He slightly viewed and slightly overpassed.
                                                  --Milton.
      [1913 Webster]

   4. To surpass; to excel. [R.] --R. Browning.
      [1913 Webster]