I. ˈshə-tər noun
Date: 1542
1. : one that shuts
2. : a usually movable cover or screen for a window or door
3. : a mechanical device that limits the passage of light ; especially : a camera component that allows light to enter by opening and closing an aperture
4. : the movable louvers in a pipe organ by which the swell box is opened
• shut·ter·less -ləs adjective
II. transitive verb
Date: 1826
1. : to close by or as if by shutters
corporations shutter ing their production plants
2. : to furnish with shutters