Cossack

English

Cossack (plural Cossacks)

A member or descendant of an originally (semi-)nomadic population of Eastern Europe and the adjacent parts of Asia, that eventually settled in parts of the Polish-Lithuanian Commonwealth, the Russian tsarist Empire (where they constituted a legendary military caste) and the Soviet Union, particularly in areas now comprising southern Russia and Ukraine.
A cossack, member of a military unit (typically cavalry, originally recruited exclusively from the above)