\Wa"ter course`\
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.