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Definition of: louver
(l
′vər) noun
1. A window, as in a belfry tower, designed for ventilation and having slats (louver boards) sloped to keep out the rain: also lou′·ver–win′dow (-win′·dō).
2. A lantern–like cupola or turret on the roof of a medieval dwelling.
3. Any of several narrow openings, or the slatted piece having these, serving as outlets for heated air. [<OF lover]
a. Construction set in gable (b).
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