The Collaborative International Dictionary of English v.0.48:

hinterland \hin"ter*land`\, n. [G.; hinter behind + land land.]
   a remote and undeveloped area; originally, the land or region
   lying behind the coast district. The term is used esp. with
   reference to the so-called

   doctrine of the hinterland, sometimes advanced, that
      occupation of the coast supports a claim to an exclusive
      right to occupy, from time to time, the territory lying
      inland of the coast.

   Syn: backwoods, back country, boondocks.
        [Webster 1913 Suppl. + WordNet 1.5]

WordNet (r) 3.0 (2006):

hinterland
    n 1: a remote and undeveloped area [syn: backwoods, back
         country, boondocks, hinterland]