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English definition of “happen”

happen

verb [I]     /ˈhæpən/
EXIST A2 If an event or situation happens, it exists or starts to be done, usually by chance : Were you anywhere nearby when the accident happened? We can't let a mistake like this happen again.Occurring and happening
RESULT A2 to be the result of an action , situation , or event that someone or something experiences : Did you hear what happened to Jamie last night ? What happens if we can't get enough tickets ?Occurring and happening
happen to do sth to do something by chance : If you happen to see Peter , say "hi" for me. You don't happen to know her phone number , do you?Chance and randomness
as it happens; it so happens something that you say in order to introduce a surprising fact : As it happens, her birthday is the day after mine.Chance and randomness
(Definition of happen verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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