[{"Bold_text": "noun", "List Items": ["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 especially for ventilation.", "a door, window, or the like, having adjustable louvers."]}, {"Bold_text": "verb (used with object)", "List Items": ["to make a louver in; add louvers to:to louver a door."]}]