river in NE Alberta & S Northwest Territories, Canada, flowing from Lake Athabasca northwest into Great Slave Lake: 258 mi (415 km)
See Slave River in American Heritage Dictionary 4
A river, about 499 km (310 mi) long, of west-central Canada flowing between Lake Athabasca in northeast Alberta and Great Slave Lake in the southern Northwest Territories. It forms the central section of the Mackenzie River system.