Definition of Caucasus in English:
Caucasus
(also Caucasia)
proper nounˈkɔːkəsəsˈkɔkəsəs
A mountainous region of south-eastern Europe and south-western Asia, lying between the Black Sea and the Caspian Sea, in Georgia, Armenia, Azerbaijan, and south-eastern Russia.
Definition of Caucasus in US English:
Caucasus
(also Caucasia)
proper nounˈkôkəsəsˈkɔkəsəs
A mountainous region of southeastern Europe and southwestern Asia, lying between the Black Sea and the Caspian Sea, in Georgia, Armenia, Azerbaijan, and southeastern Russia.