from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. An East Asian region, south of Siberia, west of Manchuria and north of Inner Mongolia (with closely related native Mongolian population), well north of the Great Wall, which never became an integral part of the Chinese empire, and later achieved autonomy and full independence of China, as the republic of Mongolia
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a landlocked socialist republic in central Asia
outer (exterior, seen from China) + Mongolia (Wiktionary)
Rumors that prisoners would be marched to Outer Mongolia (Gobi Desert) to prevent recapture.