noun /tɪˈbet,təˈbet/
a) A plateau region in Central Asia, where the Tibetan people traditionally live, encompassing what is now Tibet Autonomous Region (also called Xizang), most of Qinghai, the western half of Sichuan, a small part of Yunnan and a small part of Gansu in the Peoples Republic of China, and also the country of Bhutan, and the Indian regions of Sikkim and Ladakh.
Wikipedia foundation.