Pronunciation enPR: văl'ē, IPA (key): /ˈvæli/ Audio (US)(file) Audio (UK)(file) Noun Singular valley Plural valleys An long, low area between hills or mountains, often with a river running through it. The area which drains into a river. Any structure resembling #1, for example, the point where two angled roofs meet. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads