Definition from Wiktionary, the free dictionary
- (historical) The regions of Central Asia lying between Siberia to the north; Tibet (Xizang) and Xinjiang, China, modern-day Pakistan, Afghanistan, and Iran to the south; the Gobi Desert to the east; and the Caspian Sea to the west.
a historical region in Asia
Former Russian Turkestan (before 1917 revolution):
Former Chinese Turkestan: