Webster’s Revised Unabridged Dictionary · 1913
Coulee
Cou′lee′ (k??′l?′), n. [F. coulée, fr. couler to run or flow.] A stream; (Geol.) a stream of lava. Also, in the Western United States, the bed of a stream, even if dry, when deep and having inclined sides; distinguished from a cañon, which has precipitous sides.