a mechanical device on a camera that opens and closes to control the time of a photographic exposure
"The photographer adjusted the shutter speed to capture the fast-moving bird in sharp detail."
a hinged blind for a window
"She pulled down the wooden shutter to keep out the noisy street traffic."
One who shuts or closes something.
"The shutter was the person responsible for closing all the windows before the storm arrived."
In plain English: A shutter is an adjustable cover that you can open or close to control how much light enters a room or camera lens.
"He pulled down the heavy wooden shutter to block out the street noise."
To close shutters covering.
"The storm was approaching, so I hurried to pull down and lock all the window shutters."
In plain English: To shut something, such as your eyes or a camera lens, by closing it tightly to block light or view.
"The storm clouds made her decide to shut the windows and draw all the curtains tight for safety."
The word shutter is formed by adding the suffix -er to shut, creating a noun that means one who or what shuts something. It entered English as a straightforward compound of these two elements rather than evolving from an older root meaning.