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English definition of “know”

know

verb     /nəʊ/ (past tense knew, past participle known)
HAVE INFORMATION [I, T] A1 to have knowledge or information about something in your mind : "How old is she?" "I don't know." Andrew knows a lot about computers . [+ question word] Do you know where the station is? [+ (that)] He knew that she was lying . Do your parents know you smoke ?Knowledge and awareness
BE FAMILIAR WITH [T] B1 to be familiar with a person , place , or thing because you have met them, been there, used it, etc before: I've known Tim since primary school . I grew up in Brussels so I know it well. Since moving to London, I've got to know (= become familiar with) some nice people .Knowledge and awareness
BE ABLE [T] A2 to be able to do something: [+ question word] Do you know how to ski ? I only know (= understand and speak ) a little Spanish .Skill, talent and ability
let sb know A2 to tell someone something: Let me know if you're going to the party .Announcing, informing and stating
GUESS CORRECTLY [T] to guess something correctly : I knew she'd arrive late. I should have known he wouldn't come.Guesses and assumptionsKnowledge and awareness
UNDERSTAND [I, T] to understand and agree with someone: I know what you mean about Pete - I wouldn't trust him at all.Words and phrases expressing agreement and acceptance
be known as sth B1 to be called something: California is also known as the Sunshine State .Names and titles
have known sth to have had experience of something: I've never known the weather be so hot .Experiencing and suffering
know better (than to do sth) B2 to have the intelligence or judgment not to do something: She should have known better than to eat so much. No wonder she feels sick now.Wise and sensible
I know B2 used when you agree with something someone has just said: "It's a lovely day , isn't it?" "I know - let's hope it lasts ."Accepting and agreeingAccepting and agreeing reluctantlyApproving and approvalWords and phrases expressing agreement and acceptance B1 used when you have an idea : I know - let's go to Helen's house .Inspiration and inspiring
you know used to emphasize that someone does know what you are referring to: You know, he's the one with curly hair .InterjectionsSounds used as interjections B1 something that you say while you are thinking what to say next: It's, you know, supposed to be a surprise .InterjectionsSounds used as interjections B1 used to emphasize what you are saying: I'm not an idiot , you know.InterjectionsSounds used as interjectionsIntensifying expressions
as far as I know B2 used to say that you think something is true , but cannot be sure : As far as I know, he's never been in prison .Knowledge and awarenessUncertaintyHesitatingAchievable
you never know B2 used to say that something could be possible although it does not seem likely : You never know - you might win the lottery .UncertaintyHesitatingAchievable
before you know it very soon : We'll be there before you know it. → See also know sth inside out, learn/know the ropes, know your stuffIn the future and soon
(Definition of know verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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