ˌextraterriˈtorial,a. [f.mod.L. phrase extrā territōri-um outside the territory + -al1.] Pertaining to, or possessed of, extraterritoriality. [1625Grotius De Jure Belli et Pacis ii. xviii. §5 [Ut legati] fictione simili constituerentur quasi extra territorium.]1869Echo 6 Apr., Extra-territorial privileges.