shutdown

Multiple Entries:
  shutdown    shut  

Concise Oxford English Dictionary © 2008 Oxford University Press:
shutdown/ˈʃʌtdaʊn/

▶noun a closure of a factory or instance of turning off a machine or computer.

Concise Oxford English Dictionary © 2008 Oxford University Press:
shut/ʃʌt/

▶verb (shuts, shutting; past and past part. shut)

• 1 move or cause to move into position to block an opening.

  ■ block an opening into (something) by moving a lid or similar part.

  ■ (usu. shut someone/thing in/out) confine or exclude by closing something such as a door.

  ■ (shut someone out) prevent an opponent from scoring in a game.

• 2 fold or bring together the sides or parts of.

• 3 make or become unavailable for business or service.

  ■ (shut down or shut something down) cease or cause something to cease business or operation.

• 4 (shut off or shut something off) stop or cause something to stop flowing or working.

• 5 (shut up or shut someone up) informal stop or cause someone to stop talking.

– phrases
be (or get) shut of informal be (or get) rid of.
shut up shop cease trading.

– origin OE scyttan ‘put (a bolt) in position to hold fast’, of W. Gmc origin; rel. to shoot.