shutdown

1. The action of stopping operations; a closing, of a computer, business, event, etc. (countable, uncountable) · You need to enter your password at startup, but it's not required at shutdown.· There is a plastic molly-guard covering the escalator's shutdown button to prevent little kids from pushing it and stopping the escalator.
2. A statement, insult, etc. that prevents the opponent from replying further. (countable, uncountable) · When he insulted me, my reply was such a shutdown that he left the room.
3. An autistic response to stress or sensory overload, in which the individual freezes up and becomes silent, motionless, and unresponsive. (countable, uncountable)
4. A defensive ploy that prevents the opposing players from attacking. (countable, uncountable)

Plural shutdowns