louver

1 of 2

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 

louvered

2 of 2

adjective

lou·​vered

variants or louvred

-və(r)d 

1

: set sloping in the manner of the boards or slats of a louver

louvered wooden shutters are very much a part of almost every dwelling

—Harold Sinclair

2

: furnished with louvers

has … controlled ventilation and diffused lighting from a louvered ceiling

—Architectural Review

Examples of louver in a Sentence

Recent Examples on the Web

Noun

Eventually, your eyes come to rest on the hotel’s facade—an impressive grid of local stone and wooden louvers that is Urquiola’s ode to the oeuvre of Rationalist architect Giuseppe Terragni. — Condé Nast, Condé Nast Traveler, 2 June 2026

The slippery aero design also includes venturi flow elements built into the underbody, as well as an active rear diffuser and active front louvers to direct air into the large front fascia. — ArsTechnica, 20 May 2026

Integrated heaters, overhead fans, or motorized louvers give you total control over the environment. — Rosehill Gardens, Kansas City Star, 20 Mar. 2026

The gunfire damaged the car’s rear end, trunk, tail light and rear window louver, according to court documents. — Mark Price, Charlotte Observer, 13 Jan. 2026

Word History

Etymology

Noun

Middle English lover, from Anglo-French

First Known Use

Noun

14th century, in the meaning defined at sense 1

Rhymes for louver

• mover
• improver
• maneuver
• remover

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