The Collaborative International Dictionary of English v.0.48:

Transalpine \Trans*al"pine\, n.
   A native or inhabitant of a country beyond the Alps, that is,
   out of Italy.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Transalpine \Trans*al"pine\, a. [L. transalpinus; trans across,
   beyond + Alpinus Alpine, from Alpes the Alps: cf. F.
   transalpin.]
   Being on the farther side of the Alps in regard to Rome, that
   is, on the north or west side of the Alps; of or pertaining
   to the region or the people beyond the Alps; as, transalpine
   Gaul; -- opposed to cisalpine. " Transalpine garbs."
   --Beau. & Fl.
   [1913 Webster]

WordNet (r) 3.0 (2006):

transalpine
    adj 1: on or relating to or characteristic of the region or
           peoples beyond the Alps from Italy (or north of the
           Alps); "ancient transalpine Gaul was an area northwest of
           the Alps and included modern France and Belgium"; "Cracow
           was a transalpine university" [syn: transalpine,
           ultramontane]
    n 1: one living on or coming from the other side of the Alps
         from Italy