noun pl. valleys
- a stretch of low land lying between hills or mountains and usually having a river or stream flowing through it
- the land drained or watered by a great river system: the Mississippi valley
- any long dip or hollow, as the trough of a wave
- Archit. the trough formed where two slopes of a roof meet, or where the roof meets a wall
Origin:
ME valey < OFr valee < val < L vallis, vale < IE base *wel-, to turn, roll > walk, well