1 a wooden or metal cover that is fixed outside a window and that can be opened or shut. A shop's shutter usually slides down from the top of the shop window. 百叶窗；活动遮板 ☞picture at curtain 见curtain插图

2 the part at the front of a camera that opens for a very short time to let light in so that a photograph can be taken （照相机的）快门 ☞picture at camera 见camera插图