Slave River
noun
a river in NE Alberta and the Northwest Territories, in Canada: flowing from Lake Athabasca NW to Great Slave Lake. 258 miles (415 km) long.
British Dictionary definitions for slave river
Slave River
noun
a river in W Canada, in the Northwest Territories and NE Alberta, flowing from Lake Athabaska northwest to Great Slave Lake. Length: about 420 km (260 miles)
Also called: Great Slave River