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1. One that shuts, as:
a. A hinged cover or screen for a window, usually fitted with louvers.
b. A mechanical device of a camera that controls the duration of a photographic exposure, as by opening and closing to allow light coming through the lens to expose a plate or film.
2. shutters Music The movable louvers on a pipe organ, controlled by pedals, that open and close the swell box.
tr.v. shut·tered, shut·ter·ing, shut·ters
1. To furnish or close with shutters: locked the doors and shuttered the windows.
2. To cause to cease operations; close down: shuttered the store for the holiday.
(Building) another word (esp Brit) for formwork