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English definition of “fact”

fact

noun     /fækt/
TRUE THING [C] A2 something that you know is true, exists, or has happened: I'm not angry that you drove my car, it's just the fact that you didn't ask me first. No decision will be made until we know all the facts. He knew for a fact (= was certain) that Natalie was lying.Reality and truthInformation and messages
REAL THINGS [U] B2 real events and experiences, not things that are imagined: It's hard to separate fact from fiction in what she says.Reality and truth
in fact/in actual fact/as a matter of fact B1 used to emphasize what is really true: I was told there were some tickets left, but in actual fact they were sold out.Intensifying expressions B2 used when giving more information about something: "Is Isabel coming?" "Yes. As a matter of fact, she should be here soon."Reality and truth
the fact (of the matter) is B2 used to tell someone that something is the truth: I wouldn't usually ask for your help, but the fact is I'm desperate.Reality and truth
(Definition of fact noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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