Definition of louver in English:


(also louvre)


  • 1Each of a set of angled slats or flat strips fixed or hung at regular intervals in a door, shutter, or screen to allow air or light to pass through.

    • ‘Ventilation consists of louvers and wide double doors at each end that are opened by hand.’
    • ‘In order to do so efficiently, doors and louvres must be adjusted by a knowledgeable operator.’
    • ‘When the fan is activated, the air movement pulls the spring-mounted louvers open, allowing the air to flow into the attic.’
    • ‘These days the computer room is ventilated by fan and also has louvres in the door.’
    • ‘Two kinds of panels are used, one opaque with vertical ridges, and the other resembling a veil, with horizontal louvres that allow light to filter into the gallery spaces.’
    • ‘For summer rain, trellising can be covered with shingles, shakes, reed fencing bamboo, window screens, louvers, canvas, glass or plastic.’
    • ‘Stylish wood window shutter panels with operable louvers offer privacy as well as control over the amount of light that enters a room.’
    • ‘Inside, there is an inner glass wall with sliding doors, while the outer skin has opening louvres.’
    • ‘For regular cleaning, dust the grilles or louvers with a soft brush or the dusting attachment of a vacuum cleaner.’
    • ‘All spaces are permeated by light striated by the louvres, but the effect can be changed radically.’
    • ‘Unlike traditional Irish shutters, they have louvres that can be adjusted for privacy and light.’
    • ‘High ceilings and louvres allow the breeze through, which keeps supporters cool.’
    • ‘Exterior shading devices include awnings, louvers, shutters, rolling shutters and shades, and solar screens.’
    • ‘My suite is a tasteful creation with wooden louvres and adobe walls, plus seductive lounges that offer equally snoozy lagoon vistas.’
    • ‘Externally, the building's horizontality is emphasized and given texture by a covering of narrow larch slats and by louvres over glass doors on the west.’
    • ‘It is also preferable that these vents be covered with screens, rather than louvers, to provide unrestricted air flow.’
    • ‘These are high ceilings, big windows and doors, with louvres, mosquito netting on four-poster beds.’
    • ‘She recalls: ‘We wanted to avoid using shading mechanisms, like louvers or screens, that would project from the wall surface.’’
    • ‘And, like any other vent, screen is used behind the louvers to prevent insects from getting in.’
    • ‘When asked, one of the waitresses was able to turn the louvers on the air conditioner so that the cooled air circulated much more effectively.’
    screen, louvre, blind, roller blind, venetian blind, curtain, shade, awning, canopy
    View synonyms
  • 2A domed structure on a roof, with side openings for ventilation.

    • ‘It has a steeply pitched octagonal roof, drawing smoke and steam upwards from the great corner fireplaces to an elaborate central louvre.’
    • ‘In appearance, they are like medieval louvres and were designed to trap the wind from any direction then funnel it through a hollow shaft to the rooms below.’


Middle English ( louver): from Old French lover, lovier skylight probably of Germanic origin and related to lodge.