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English definition of “go off”

go off

verb uk phrasal verb with go   /ɡəʊ/ us    /ɡoʊ/ (present participle going, past tense went, past participle gone)

(STOP WORKING)

B1 If a light or a machine goes off, it stops working: The lights went off in several villages because of the storm.Not functioningNot pleasant to eat or drink

(EXPLODE)

C1 If a bomb goes off, it explodes: The bomb went off at midday.Exploding and erupting C1 If a gun goes off, it fires: His gun went off accidentally.GunsDetonation and bombardment

(FOOD)

B2 UK If food or drink goes off, it is not good to eat or drink any more because it is too old: This bacon smells a bit funny - do you think it's gone off?
See also
Decaying and staying fresh

(NOISE)

B2 If a warning device goes off, it starts to ring loudly or make a loud noise: The alarm should go off automatically as soon as smoke is detected. Didn't you hear your alarm clock going off this morning?Sounds made by objects, movement or impact

(LEAVE)

B1 to leave a place and go somewhere else: She's gone off to the pub with Tony

(HAPPEN)

to happen in a particular way: The protest march went off peacefully.Occurring and happening

(BECOME WORSE)

UK to become worse in quality: That paper's really gone off since they got that new editor.Deteriorating and making worse
(Definition of go off from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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