Definition of louver
1 : a roof lantern or turret often with slatted apertures for escape of smoke or admission of light in a medieval building
2a : 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 privacyb : a finned or vaned device for controlling a flow of air or the radiation of lightc : a fin or shutter of a louver
From the M-W Editors
Recent Examples of louver from the Web
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The cedar eaves and vertical louvers that wrap the exterior provide an additional layer of privacy while diffusing interior light at night for an eye-catching design element.
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The wood louver shutters are drawn to block your view of the dollar store and Aurora outside.
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Zizzo was at it early on Friday, cleaning the louvers on the air conditioner in his racing trailer.
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Aston Martin added extraction louvers above the front wheel arches to reduce air pressure and lift, and pairs of carbon-fiber dive planes create additional front-end downforce.
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An active front grille with louvers that close at highway speed to enhance aerodynamic and open at low speed to provide maximum cooling to the fuel cell stack.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'louver.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of louver
Middle English lover, from Anglo-French
LOUVER Defined for English Language Learners
louver
playDefinition of louver for English Language Learners
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: 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
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: one of the slanted strips of a louver
Learn More about louver
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See words that rhyme with louver Spanish Central: Translation of louver Nglish: Translation of louver for Spanish speakers Britannica.com: Encyclopedia article about louver
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