weir.

A low barrier across flowing water that raises or controls its level.

Use it for

Words that belong together

• stone weir
• overflow weir

On the page

Foam collected beneath the stone weir.

Usage notes

Primary category: setting / environment. Forms: Singular weir; plural weirs. 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.