01 n. One who shuts or closes.
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1.
One who shuts or closes.
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2.
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.
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3.
A removable cover, or a gate, for closing an aperture of any kind, as for closing the passageway for molten iron from a ladle.
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4.
A mechanical device of various forms, attached to the aperture of a camera lens for opening and closing to expose the plate. It is usually designed so that the time during which the aperture is opened may be varied by a manual dial or by some automatic mechanism, thereby allowing proper exposure of a photographic film under different intensities of light.(Photog.)