- a mountain range in Caucasia, between the Black and Caspian seas, along the border between the Russian Federation, Georgia, and Azerbaijan. Highest peak, Mt. Elbrus, 18,481 feet (5,633 meters).
- a region between the Black and Caspian seas: divided by the Caucasus Mountains into Ciscaucasia in Europe and Transcaucasia in Asia.
- a mountain range in SW Russia, running along the N borders of Georgia and Azerbaijan, between the Black Sea and the Caspian Sea: mostly over 2700 m (9000 ft). Highest peak: Mount Elbrus, 5642 m (18 510 ft)
- another name for Caucasia
