Lake
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
Fresh-water lakes are bodies of standing water distinguishable from rivers chiefly by the fact that they have no current. The fact that there is a current from a higher to a lower level does not make that a river which would otherwise be a lake, nor does a lake lose its distinctive character because there is a current in it for a certain distance tending towards a river which forms its outlet.
Gould Waters, § 79.