coulee

(ko͞oˈlē)

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