noun
pl. -·leys- a stretch of lowland 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 of valley
Middle English valey from Old French valee from val from Classical Latin vallis, vale from Indo-European base an unverified form wel-, to turn, roll from source walk, well
