View your list of saved words. (You can log in using Facebook.)
Very narrow, deep valley cut by a river through resistant rock and having steep, almost vertical sides. Canyons occur most often in arid or semiarid regions. Some canyons (e.g., the Grand Canyon) are spectacular natural features. See alsosubmarine canyon.
This entry comes from Encyclopædia Britannica Concise. For the full entry on canyon, visit Britannica.com.