shut off something/someone/yourself
— phrasal verb with shut us/ʃʌt/verb [ I/T ] present participle shutting, past tense and past participle shut
(SEPARATE)
to separate something or someone from other parts, places, or people:
Railroad tracks shut off the area from the rest of the city.
On cooler evenings we shut the living room off and stay warm by the fireplace.
Growing up deep in the mountains, we felt shut off from the outside world.