Mongoliamŏn-gō´lēə, mŏng– [key], republic (2015 est. pop. 2,977,000), 604,247 sq mi (1,565,000 sq km), N central Asia; historically known as Outer Mongolia. Bordered on the west, south, and east by China and on the north by Russia, it comprises more than half the historical region of Mongolia; the other part forms China's Inner Mongolian Autonomous Region. The capital and largest city is Ulaanbaatar.
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