louver

noun

lou·​ver ˈlü-vər 

variants or louvre

1

: a roof lantern or turret often with slatted apertures for escape of smoke or admission of light in a medieval building

2

a

: an opening provided with one or more slanted fixed or movable fins to allow flow of air but to exclude rain or sun or to provide privacy

b

: a finned or vaned device for controlling a flow of air or the radiation of light

c

: a fin or shutter of a louver

louvered adjective

or less commonly louvred

ˈlü-vərd 

Examples of louver in a Sentence

Recent Examples on the Web

The engine cover has six louvers, one for each of the cylinders. —Jason Barlow, WIRED, 17 Oct. 2024

Taking its name from developer Tiger Properties and not to be confused with the Singapore tower of the same name, the Tiger Sky Tower will reach a height of 532 m (1,745 ft) and feature a glazed exterior enlivened by what look like some metallic shading louvers in the renders. —Adam Williams, New Atlas, 26 Sep. 2024

This includes a new front splitter, air outlets (louvers) in the front fenders, changes to the side skirts, underbody and rear diffuser. —Mark Ewing, Forbes, 17 Aug. 2024

Squirrels can also enter through roof vents, attic louvers, and ventilation fan openings. —Sophie Flaxman, Better Homes & Gardens, 17 Aug. 2024

Word History

Etymology

Middle English lover, from Anglo-French

First Known Use

14th century, in the meaning defined at sense 1

Kids Definition

louver

noun

lou·​ver

variants or louvre

ˈlü-vər 

1

: an opening provided with one or more slanted strips to allow flow of air or light but to exclude rain or sun or to provide privacy

2

: one of the slanted strips of a louver

louvered

-vərd

adjective