shutter

Universal Words noun 1 [usuallypl.] one of a pair of wooden or metal covers that can be closed over the outside of a window to keep out light or protect the windows from damage: to open / close the shutters * They explored, throwing open the shutters in each of the big rooms. * (BrE, figurative) More than 70000 shopkeepers have been forced to put up the shutters (= close down their businesses) in the past year. 2 the part of a camera that opens to allow light to pass through the LENS when you take a photograph: the quiet click of the shutter * a fast shutter speed IDIOMS bring / put down the shutters to stop letting sb know what your thoughts or feelings are; to stop letting yourself think about sth: He brought down the shutters on the image of the dying girl.