/koohl wahr"/ ; Fr. /kooh lwannrdd"/ , n. , pl. couloirs /koohl wahrz"/ , Fr. /kooh lwannrdd"/ .
a steep gorge or gully on the side of a mountain, esp. in the Alps.
[ 1850-55; colatorium strainer, equiv. to L cola ( re ) to strain, filter + -torium -TORY 2 ; see COULEE ]