Meaning of “shut (sth) down” - Learner’s Dictionary

shut (sth) down

phrasal verb with shut uk us /ʃʌt/ verb [ I, T ] (present participle shutting, past tense and past participle shut)

B2 If a business or a large piece of equipment shuts down or someone shuts it down, it stops operating:

Many factories have been forced to shut down.
We shut the whole computer system down for 24 hours.

(Definition of “shut (sth) down” from the Cambridge Learner’s Dictionary © Cambridge University Press)