Source : Webster's Revised Unabridged Dictionary (1913)

Exterritorial \Ex*ter`ri*to"ri*al\, a. [Pref. ex? +
   territorial.]
   Beyond the territorial limits; foreign to, or exempt from,
   the territorial jurisdiction. -- {Ex*ter`ri*to"ri*al*ly},adv.

Source : WordNet®

exterritorial
     adj : outside territorial limits or jurisdiction; "fishing in
           extraterritorial waters"; "enjoying exterritorial
           privileges and rights" [syn: {extraterritorial}] [ant:
           {territorial}]