Also, Thibet. Also called Sitsang, Xizang. Official name Tibet Autonomous Region. an administrative division of China, N of the Himalayas: prior to 1950 a theocracy under the Dalai Lama; the highest country in the world, average elevation about 16,000 feet (4877 meters). 471,660 sq. mi. (1,221,599 sq. km).
Plateau of. Also called Tibetan Highlands, Roof of the World. a vast plateau in S central Asia bounded by the Tarim and Qaidam basin deserts to the N and the Himalayan, Karakoram, and Pamir mountain ranges to the S and W: highest plateau in the world, averaging about 15,000 feet (4570 meters). 850,000 sq. mi. (2,200,000 sq. km).
an autonomous region of SW China; formerly a theocracy and the centre of Lamaism: Europeans strictly excluded in the 19th century; invaded by China in 1950; rebellion (1959) against Chinese rule suppressed and the Dalai Lama fled to India; military rule imposed (1989–90) after continued demands for independence; consists largely of a vast high plateau between the Himalayas and Kunlun Mountains. Capital: Lhasa. Pop: 2 700 000 (2003 est). Area: 1 221 601 sq km (471 660 sq miles) Chinese names Xizang Autonomous Region, Sitsang