When a shop closes down, or even closes for the night, the shutters are pulled down over the windows, hence it is 'shuttered.' I think it's an Americanism. I u

When a shop closes down, or even closes for the night, the shutters are pulled down over the windows, hence it is 'shuttered.' I think it's an Americanism. I used the term once in a news story for a (British) radio station I worked for, and it was edited out by management and replaced with (I think) 'closed down.' I hadn't realised it was a foreign term until then!