A deep gorge in Arizona, formed by the Colorado River. It is about 440 km (277 miles) long, 8 to 24 km (5 to 15 miles) wide, and, in places, 1,800 m (6,000 ft) deep. The area was designated a national park in 1919.
Definition of Grand Canyon in US English:
Grand Canyon
proper nounˌɡran(d) ˈkanyən
A deep gorge in Arizona, formed by the Colorado River. It is about 277 miles (440 km) long, 5–15 miles (8–24 km) wide, and, in places, 6,000 feet (1,800 m) deep. The area was designated a national park in 1919.