Caucasus /ˈkɔːkəsəs/ noun2 •A mountain range in Eastern Europe between the Black Sea and the Caspian Sea, on territory of Russia, Georgia, Armenia and Azerbaijan, which includes the ranges of Greater Caucasus and Lesser Caucasus.Oh who can hold a fire in his hand / By thinking on the frostie Caucasus? / Or cloy the hungry edge of appetite, / by bare imagination of a Feast? — 1595 •A geopolitical region in Eastern Europe and Western Asia, deriving its name from the aforementioned mountains.