valley
n. countable A2 Elementary Oxford US //ˈvæɫi// UK //vˈæli// val·ley
n. a low area of land between hills or mountains. It often has a river or stream running through it.
n. a low-lying stretch of land between hills, mountains, or other uplands, typically drained by a river system.
The village sits in a green valley.
The hikers followed the river as it wound through the deep valley between the two peaks.
The fertile valley floor provided an ideal environment for early settlements, offering both protection from the wind and a reliable source of fresh water from the mountain runoff.