Si·er·ra Le·one [ see èrrə lee ṓn ]country in West Africa, bordered by Guinea, Liberia, and the Atlantic Ocean. It became an independent member of the British Commonwealth in 1961. Languages: English. Currency: leone. Capital: Freetown. Population: 6,440,053 (2009 estimate).
Area: 71,740 sq km (27,699 sq mi) Official name Republic of Sierra Leone
