Meaning of “careful” in the English Dictionary

british dictionary

"careful" in British English

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carefuladjective

uk /ˈkeə.fəl/ us /ˈker.fəl/

A2 giving a lot of attention to what you are doing so that you do not have an accident, make a mistake, or damage something:

Be careful with the glasses.
Be careful where you put that hot pan.
Be careful to look both ways when you cross the road.
Michael is a very careful worker.
After careful consideration of your proposal, I regret to say that we are unable to accept it.
He's in a really foul temper so be careful (about/of) what you say to him.

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(Definition of “careful” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"careful" in American English

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carefuladjective

us /ˈkeər·fəl/

giving attention to something in order to avoid esp. an accident or problem:

Norman is a careful driver.
Give my suggestion careful consideration.
[ + question word ] He’s in a really bad mood so be careful what you say to him.
[ + question word ] Be careful where you put that hot pan.
[ + to infinitive ] Be careful to look both ways when you cross the street.

(Definition of “careful” from the Cambridge Academic Content Dictionary © Cambridge University Press)