canyon
n. countable B1 Intermediate US //ˈkænjən// UK //kˈænɪən// canyon
n. a deep valley with very steep sides made of rock. A river usually flows through the bottom of it.
n. a deep, narrow valley with steep sides, often carved through rock by the erosive action of a river over a long geological period.
The river flows through a deep canyon.
Hikers spent the entire afternoon descending the steep trails into the canyon to reach the riverbed.
The vast canyon reveals millions of years of geological history through the distinct layers of sediment exposed along its sheer sandstone walls.
Usage
Often used with 'deep', 'narrow', or 'steep' as modifiers.