1. a set of horizontal slats or blades arranged to allow air or light to pass through while blocking direct view or rain
Usage: also spelled 'louvre' in British English
2. an opening in a roof or wall fitted with louvers for ventilation

Examples

• The louvers on the window allow fresh air to enter while keeping out the rain.
• She adjusted the louvers to control the amount of sunlight in the room.
• The attic louver helps prevent moisture buildup in the roof.
• Venetian blinds have adjustable louvers that tilt to regulate privacy and light.
• The car's hood louvers improve engine cooling and airflow.
• The louvers in the bathroom vent help remove humidity after a shower.