any of a series of narrow openings framed at their longer edges with slanting, overlapping fins or slats, adjustable for admitting light and air while shutting out rain.

a fin or slat framing such an opening.

a ventilating turret or lantern, as on the roof of a medieval building.

any of a system of slits formed in the hood of an automobile, the door of a metal locker, etc., used esp. for ventilation.

a door, window, or the like, having adjustable louvers.

to make a louver in; add louvers to

to louver a door.

noun

blind , slat