louver.

An angled slat in a door, window, or vent, or an opening fitted with such slats.

Use it for

Words that belong together

• ventilation louvers
• adjustable louvers
• louvered door

On the page

Dust rested along every louver in the cupboard door.

He adjusted the louvers until the afternoon glare softened.

Through the vent's louvers, she could hear the generator running.

Usage notes

Primary category: architecture. Variant louvre; admits air while limiting rain, glare, or visibility. The slats may be fixed or adjustable. Count noun: louvers; variant louvre, plural louvres. Derived adjective: louvered/louvred.