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

This will feature lots of natural light thanks to the skylights already mentioned, plus a transparent facade made up of aluminum and glass, with glazed louvers. —Adam Williams, New Atlas, 27 Feb. 2025

Kurtz said the family already had invested in automation that watered plants on timers and opened greenhouse louvers, allowing greater circulation based on inputs from an on-site weather station that measurers sunlight, temperature and humidity. —Mark Pazniokas, Hartford Courant, 23 Apr. 2025

These observations were then translated into the home’s design, including the placement of louvers to modulate light and shade and massive windows that both frame the sweeping views afforded by the location and allow for natural lighting and cross-ventilation during the day. —Tori Latham, Robb Report, 9 Apr. 2025

There are no louvers on the long hood, which in itself, is the longest on a Morgan. —New Atlas, 23 Mar. 2025

Word History

Etymology

Middle English lover, from Anglo-French

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for louver

• mover
• approver
• 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