louver
/ˈluːvər/
noun
- One of a set of angled slats or strips, usually in a frame, that allow air or light to pass through while blocking rain, direct sunlight, or visibility.
- He adjusted the louvers on the air vent to direct the cool air upward.
- The window's louvers let in a breeze even during a light rain.
- Each louver on the shutter was tilted to keep the afternoon sun out.
Synonyms