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louver

noun lou·ver \ˈlü-vər\

Simple Definition of louver

  • : an opening in a door or window that has one or more slanted strips to allow air to flow in and out while keeping out rain and sun

  • : one of the slanted strips of a louver

Full Definition of louver

  1. 1 :  a roof lantern or turret often with slatted apertures for escape of smoke or admission of light in a medieval building

  2. 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

lou·vered also lou·vred play \-vərd\ adjective

Variants of louver

or lou·vre play \ˈlü-vər\

Origin of louver

Middle English lover, from Anglo-French


First Known Use: 14th century

Rhymes with louver


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