| a river in NE Alberta and the Northwest Territories, in Canada: flowing from Lake Athabaska NW to Great Slave Lake. 258 mi. (415 km) long. |
| Slave River 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. |