forget Definition in the Cambridge English Dictionary
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Definition of “forget” - English Dictionary

Definition of "forget" - American English Dictionary

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forgetverb [I/T]

 us   /fərˈɡet, fɔr-/ (present participle forgetting, past tense forgot  /fərˈɡɑt, fɔr-/ , past participle forgotten  /fərˈɡɑt·ən, fɔr-/ or forgot)
to be ​unable to ​remember; ​fail to ​remember: [T] You’d ​better not forget ​your mother’s ​birthday. [+ (that) clause] She forgot (that) she had a ​dentalappointment. [+ to infinitive] Don’t forget to ​lock the ​car. To forget (about) is to ​stopthinking about someone or something, or to ​stopthinking about doing something: [T] I ​wish I could forget him but I can’t. [I] I’m ​afraid we’ll have to forget about going to the ​beach – it’s raining.
(Definition of forget from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "forget" - British English Dictionary

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forgetverb

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 ​yourname. 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 ​rememberingpeople).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 ​stopthinking about someone or something: He ​tried to forget her. It ​seemedunlikely that the ​debt would ​ever be ​paid off so we just forgot (about) it.

forget verb (BEHAVE BADLY)

forget yourself to ​act in a ​sociallyunacceptable way because you have ​lostcontrol of ​youremotions: He was so ​angry he forgot himself and ​sworeloudly.
(Definition of forget from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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