transitive verb
1.
a. : to cut off (as a flow or passage or something flowing or passing) : stop
shut the steam off
would require shutting off the patient's circulation during part of the operation — Ben & Marie Pearse
shut off the flow of visitors — American Guide Series: Arkansas
b. : to stop the operation of (as a machine)
shuts off his motor — P.B.Kyne
shuts the machine off when a full package of yarn is completed — V.A.Schiffer
shut the radiator off
c. : to block or terminate the operation or activity of
shut off the supply of new three percent savings bonds — Harold Wincott
shut off its high-powered … recruiting campaign — Newsweek
shut off this racket by scowling at him — L.C.Douglas
2. : to close off : separate — usually used with from
would have shut Guatemala off from the Atlantic coast — C.L.Jones
long arms of the ridge shut us off from the world — Elyne Mitchell
shut off from most of the activities and pleasures of normal children — W.E.Clark
intransitive verb
: to cease operating : stop
the generator shuts off automatically