Meaning of “forget” - Learner’s Dictionary

forget

verb us uk /fəˈɡet/ present participle forgetting, past tense forgot, past participle forgotten
My trip to Australia was an experience I'll never forget.I completely forgot that you were coming.I'd forgotten it was his birthday.There's one essential point I think you've forgotten.I always forget where I've parked the car.
NOT REMEMBER [ I, T ]

B1 to be unable to remember a fact, something that happened, or how to do something:

I've forgotten his name.
[ + (that) ] Don't forget that Lucy and John are coming this weekend.
He'd completely forgotten about their quarrel.
[ + question word ] You never forget how to ride a bike.
NOT DO [ I, T ]

A2 to not remember to do something:

[ + to do sth ] Dad's always forgetting to take his pills.
NOT BRING [ T ]

A2 to not bring something with you because you did not remember it:

Oh no, I've forgotten my passport.
STOP THINKING [ T ] also forget about

B1 to stop thinking about someone or something:

I'll never forget him for as long as I live.
Let's try to forget about work and have a good time.
forget it

used to tell someone not to worry about something as it is not important:

"I'm sorry I missed your birthday." "Forget it, it doesn't matter."
I forget

used instead of 'I have forgotten':

I forget when we last saw him.
forget yourself

to do or say something that is not acceptable in a particular situation:

She completely forgot herself and started screaming at him.

(Definition of “forget” from the Cambridge Learner’s Dictionary © Cambridge University Press)