spillway.

A channel or structure that carries excess water away from a dam or reservoir.

Use it for

Words that belong together

• emergency spillway
• concrete spillway

On the page

Water thundered down the emergency spillway.

Usage notes

Primary category: setting / environment. Forms: Singular spillway; plural spillways. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: setting, description. Commonness: moderately common.