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English definition of “forget”

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forget

verb uk   /fəˈɡet/ us    /fɚ-/ ( present participle forgetting, past tense forgot, past participle forgotten)

forget verb (NOT REMEMBER)

B1 [I or T] to be unable to remember a fact, something that happened, or how to do something: I'm sorry, I've forgotten your name. Let me write down that date before I forget it. I completely forgot about Jenny's party. [+ (that)] We had forgotten (that) she doesn't come on Thursdays. I'm sorry, I was forgetting (= I had forgotten) (that) you would be away in August. [+ -ing verb] She would never forget seeing the Himalayas for the first time. [+ question word] I've forgotten what you do next/how to do it. I never forget a face (= I'm good at remembering people).not forgetting UK including: This is where we keep all the books, not forgetting the magazines and newspapers.
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forget verb (NOT DO)

A1 [I + to infinitive, T] to not remember to do something: Don't forget to lock the door. Dad's always forgetting (to take) his pills.
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forget verb (NOT BRING)

A2 [T] to not bring something with you because you did not remember it: I forgot my keys.
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forget verb (STOP THINKING)

B1 [I or T] to stop thinking about someone or something: He tried to forget her. It seemed unlikely that the debt would ever be paid off so we just forgot (about) it.

forget verb (BEHAVE BADLY)

forget yourself to act in a socially unacceptable way because you have lost control of your emotions: He was so angry he forgot himself and swore loudly.
(Definition of forget from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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