COULEE

(1) (Western U.S.) A deep gulch or ravine with sloping sides, often dry in summer. (2) (Louisiana and Southern Mississippi) A streambed, often dry according to the season; a small stream, bayou, or canal. (3) (Upper Midwest) A valley with hills or either side. (4) (Geology) A stream of molten lava; a sheet of solidified lava.