a river in southwestern Africa, rising in central Angola and flowing east then north as part of the border between Angola and the Democratic Republic of the Congo, continuing northwest through the Democratic Republic of the Congo to the River Congo. Length: 2154 km (1338 miles)
Kasai in American English
(kɑˈsaɪ)
river in SC Africa, flowing from Angola northwest into the Congo River: c. 1,100 mi (1,770 km)