n. - One who shuts or closes.
n. - A movable cover or screen for a window, designed to shut out the light, to obstruct the view, or to be of some strength as a defense; a blind.
n. - A removable cover, or a gate, for closing an aperture of any kind, as for closing the passageway for molten iron from a ladle.
n. - A mechanical device of various forms, attached to a camera for opening and closing to expose the plate.