Black Volta
noun
a river in W Africa, in Ghana: the upper branch of the Volta River. About 500 miles (800 km) long.
British Dictionary definitions for black volta
Black Volta
noun
a river in W Africa, rising in SW Burkina Faso and flowing northeast, then south into Lake Volta: forms part of the border of Ghana with Burkina-Faso and with Côte d'Ivoire. Length: about 800 km (500 miles)