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Meaning of “know” - Learner’s Dictionary

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 stuff In the future and soon
(Definition of know verb from the Cambridge Learner’s Dictionary © Cambridge University Press)
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