Definify.com
Webster 1913 Edition
Water course
Wa′ter courseˊ
.1.
A stream of water; a river or brook.
Isa. xliv. 4.
2.
A natural channel for water; also, a canal for the conveyance of water, especially in draining lands.
3.
(Law)
A running stream of water having a bed and banks; the easement one may have in the flowing of such a stream in its accustomed course. A water course may be sometimes dry.
Angell.
Burrill.