Shutter
Pronunciation : Shut"ter
Part of Speech : n.
Definition : 1. One who shuts or closes.
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.
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.
Source : Webster's Unabridged Dictionary, 1913