- The definition of a jalousie is a window or door covering with louvers or slats which can be arranged to allow in different amounts of light or air.
An example of a jalousie is a set of blinds.
Sunlight coming through jalousies.Licensed from iStockPhoto
Origin: Fr from Italian gelosia, literally , jealousy: probably so named from permitting one to see without being seen
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Origin: French, from jalousie, jealousy, from Old French gelosie, from gelos, jealous; see jealous.