a river in W Africa, in Ghana: the upper branch of the Volta River. About 500 miles (800 km) long.
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British Dictionary definitions for Black Volta
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)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012