Window Shutter

Riddle: I'm sometimes called a window, but I have no shutters. What am I?

Answer:

The riddle "Window shutter" is unanswered. Do you know the answer? If so, add your answer in the comments section below.

Source: https://www.riddles.com/6331

I'm sometimes called a window, but I have no shutters. What am I? — Window shutter by Danny Zymantas v1.

Riddle: I'm sometimes called a window, but I have no shutters. What am I? Answer: I don't know the answer. — by Danny Zymantas v2.