I. shut ‧ ter 1 /ˈʃʌtə $ -ər/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Origin: ⇨ ↑ shut 1 ]
1 . [usually plural] one of a pair of wooden or metal covers on the outside of a window that can be closed to keep light out or prevent thieves from coming in
2 . a part of a camera that opens for a very short time to let light onto the film
II. shutter 2 BrE AmE verb [transitive usually passive]
American English to close a business, office etc for a short time or permanently:
The company shuttered its Hong Kong business a year ago.