A ravine formed by a river in an area with little rainfall WordNet 3.0 & Open English WordNet

A canyon, gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Wikipedia

Wide and deep ravine between cliffs Wikidata

A valley, especially a long, narrow, steep valley, cut in rock by a river. OmegaWiki

A long deep, relatively narrow steep-sided valley confined between lofty and precipitous walls in a plateau or mountainous area, often with a stream at the bottom; similar to, but largest than, a gorge. It is characteristic of an arid or semiarid area OmegaWiki