shutters

/SH AH1 T ER0 Z/
noun
  1. 1

    One who shuts or closes something.

  2. 2

    (usually in the plural) Protective panels, usually wooden, placed over windows to block out the light.

  3. 3

    The part of a camera, normally closed, that opens for a controlled period of time to let light in when taking a picture.

Source: https://en.wiktionary.org/wiki/shutter, https://en.wiktionary.org/wiki/shutters