go off - Definition in the Essential British English Dictionary - Cambridge Dictionaries Online

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English definition of “go off”

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go off

phrasal verb with go
 
/ɡəʊ/ verb (going, went, gone)
B1 to leave a place and go somewhere else: She went off with Laurie.
B1 If a light or machine goes off, it stops working: The heating goes off at ten o’clock.
If a bomb or gun goes off, it explodes or fires.
If something that makes a noise goes off, it suddenly starts making a noise: His car alarm goes off every time it rains.
UK If food goes off, it stops being good to eat because it is too old: That milk has gone off.
(Definition of go off from the Cambridge Essential Dictionary © Cambridge University Press)
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