Pronunciation: (toor-kä'nu),[key] —n., —pl.-nas,(esp. collectively)-nafor 1. 1. a member of a seminomadic people of northwestern Kenya and bordering areas of Uganda.
2. the Nilotic language of the Turkana.
3. Lake. Formerly, Rudolf. a lake in E Africa, in NE Kenya. 185 mi. (298 km) long; 3500 sq. mi. (9100 sq. km).