trans-ˈfrontier,a. [trans- 3.] Lying, living, or done beyond the frontier of a country. 1877Ld. Lytton Lett. (1906) II. xv. 481 The rudest and most unmanageable transfrontier chieftains.1909Daily Chron. 22 Jan. 3/4 A personal history of trans-frontier surveys and boundary demarcations.