0 If a machine or system shuts off, or if someone or something shuts it off, it stops operating: --
3 if a supply or process is shut off or someone shuts it off, it stops: --
4 if a computer or other machine is shut off or someone shuts it off, it stops working: --
5 if electricity, gas, etc. shuts off, or someone shuts it off, it stops being supplied: --
Power shut off in several neighborhoods last night after the storm.
The national power company shut off electricity in hopes of preventing fires.