/ kɒsək /
Množina reči Cossack je Cossacks.
People of S and SW Russia, Ukraine, and Poland, predominantly of Russian or Ukrainian origin, who took in escaped serfs and lived in independent communal settlements (military brotherhoods) from the 15th to the 19th century. Later they held land in return for military service in the cavalry under Russian and Polish rulers. After 1917, the various Cossack communities were incorporated into the Soviet administrative and collective system.
One of a warlike, pastoral people, skillful as horsemen, inhabiting different parts of the Russian empire and furnishing valuable contingents of irregular cavalry to its armies, or those of Little Russia.