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shutter definition

shut·ter (s̸hut′ər)

noun

  1. a person or thing that shuts
  2. a movable screen or cover for a window, usually hinged and often fitted with louvers
  3. anything used to cover an opening, as a slide or door on a lantern
  4. Photog. a device that controls the duration of an exposure by opening and closing, allowing light to reach the film or plate for a specified amount of time

transitive verb

to close or furnish with a shutter or shutters

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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