Shutter

noun
1.
a solid or louvered movable cover for a window.
2.
a movable cover, slide, etc., for an opening.
3.
a person or thing that shuts.
4.
Photography. a mechanical device for opening and closing the aperture of a camera lens to expose film or the like.
verb (used with object)
5.
to close or provide with shutters:
She shuttered the windows.
6.
to close (a store or business operations) for the day or permanently.
verb (used without object)
7.
to close or close down:
The factory has shuttered temporarily.
noun
1.
a hinged doorlike cover, often louvred and usually one of a pair, for closing off a window
2.
put up the shutters, to close business at the end of the day or permanently
3.
(photog) an opaque shield in a camera that, when tripped, admits light to expose the film or plate for a predetermined period, usually a fraction of a second. It is either built into the lens system or lies in the focal plane of the lens (focal-plane shutter)
4.
(photog) a rotating device in a film projector that permits an image to be projected onto the screen only when the film is momentarily stationary
5.
(music) one of the louvred covers over the mouths of organ pipes, operated by the swell pedal
6.
a person or thing that shuts
verb (transitive)
7.
to close with or as if with a shutter or shutters
8.
to equip with a shutter or shutters