noun
or lou·vre ˈlüvə(r)
( -s )
Etymology: Middle English lover, from Middle French lovier
1.
a. : a roof lantern or turret often with slatted apertures for escape of smoke or admission of light in a medieval building
b. obsolete : a dovecote resembling a louver
2.
a. : an opening in wall or ceiling for ventilation or cooling provided with one or more slanted fins to exclude rain and sun and often made so that the fins may be closed at will — compare brise-soleil
b. : a fin or shutter of a louver
3. : a fixed or adjustable louver for cooling of an enclosed engine or motor (as of an airplane, automobile, or machine)
4. : a finned or vaned device to deflect or control a flow of air or the radiation of light
ceiling fixtures with louvers seem to diffuse and soften light
electric fans are often fitted with circular louvers to direct the airstream
5. : a closure using adjustable slanted louvers
pulled the louvers in our room as tight as they'd go, but in a couple of hours the water had washed in over our shoes — Land Kaderli