a major river of central Africa, which rises as the River Lualaba to the south of Kisangani in northern Democratic Republic of Congo (Zaire) and flows 4,630 km (2,880 miles) in a great curve westwards, turning south-westwards to form the border with the Congo before emptying into the Atlantic

an equatorial country in Africa, with a short Atlantic coastline; population 6,800,000 (estimated 2015); languages, French (official), Kikongo, and other Bantu languages; capital, Brazzaville. Also called Republic of Congo, Congo-Brazzaville