Definitions of shut:

• verb:   move so that an opening or passage is obstructed; make shut

  Example: "Shut the window"

• verb:   become closed
• verb:   prevent from entering; shut out

  Example: "The trees were shutting out all sunlight"

• adjective:   not open

  Example: "The door slammed shut"

• adjective:   used especially of mouth or eyes

  Example: "His eyes were shut against the sunlight"