one of a pair of exterior wooden or metal covers of a window that can be closed for preventing light from coming in or protecting the house against thieves or other threats
What is a "shutter"?
A shutter is a type of window treatment that is installed on the inside or outside of a window and is designed to control the amount of light and air that enters a room. Shutters typically consist of a frame that surrounds a series of horizontal or vertical slats, which can be adjusted to allow more or less light and air to enter. They are available in a variety of materials, including wood, vinyl, and composite materials, and can be customized to fit any window size or shape. Shutters can be operated manually, or with a motorized system, and are often used for both decorative and functional purposes. They can provide privacy, insulation, and noise reduction, while also enhancing the curb appeal and value of a home.
a mechanical device in a camera or projector that regulates the exposure time of each frame of film or video