Definition of shut off phrasal verb from the Oxford Advanced American Dictionary

 

shut off

 phrasal verb
phrasal verb
 
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Phrasal Verbs
(of a machine, tool, etc.) to stop working The engines shut off automatically in an emergency.

    shut somethingoff

     
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  1. 1to stop a machine, tool, etc. from working I wish someone would shut off that car alarm.
  2. 2to stop a supply of gas, water, etc. from flowing or reaching a place A valve immediately shuts off the gas when the lid is closed.
See the Oxford Advanced Learner's Dictionary entry: shut off

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