shut down is a verb meaning "cease to operate or cause to cease operating". It carries one recorded sense.
cease to operate or cause to cease operating
“The owners decided to move and to close the factory”
“My business closes every night at 8 P.M.”
“close up the shop”
Definitions, synonyms and semantic relations for shut down come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.