- a mountain range of volcanic origin in NW Chad, in the central Sahara extending for about 480 km (300 miles). Highest peak: Emi Koussi, 3415 m (11 204 ft)
Examples from the Web for tibesti
Beyond Tejerri the Saharan plateau rises continuously to the Tibesti highlands.
It is bounded N. by the Tibesti Mountains, and is in great measure occupied by lesser elevations belonging to the same system.