What is the meaning of shutting?

noun

• The act of closing something.
  • synonyms: closing

verb

• Move so that an opening or passage is obstructed; make shut.
  • usage: "Close the door"; "shut the window"
  • synonyms: close, shut
• Become closed.
  • usage: "The windows closed with a loud bang"
  • synonyms: close, shut
• Prevent from entering; shut out.
  • usage: "The trees were shutting out all sunlight"; "This policy excludes people who have a criminal record from entering the country"
  • synonyms: exclude, keep out, shut out, shut