A jalousie window (UK: /ˈdʒælʊziː/, US: /ˈdʒæləsiː/), louvred window (Australia, New Zealand, Pacific Islands, Southeast Asia, United Kingdom), jalousie, or jalosy[1] is a window composed of parallel glass, acrylic, or wooden louvres set in a frame. The louvres are joined onto a track so that they may be tilted open and shut in unison to control airflow, usually by turning a crank.
Jalosy windows, also known as jalousie windows, have a distinct charm that sets them apart from other window types. Originating in French-speaking regions, these windows gained popularity across Europe and the United States during the mid-20th century.