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English definition of “about”

about

preposition  /əˈbɑʊt/ us  

about preposition (CONNECTED WITH)

on the subject of; connected with: "What’s that book about?" "It’s about the Civil War." I don’t know what all the fuss is about. There’s something about her attitude that worries me.

about

adverb [not gradable]  /əˈbɑʊt/ us  

about adverb [not gradable] (APPROXIMATELY)

a little more or less than a specific number; approximately: He’s about six feet tall. It happened about two months ago. I’ve had just about enough of your complaining (= I do not want to hear any more).

about

adjective [+ to infinitive; not gradable]  /əˈbɑʊt/ us  

about adjective [+ to infinitive; not gradable] (INTENDING)

almost ready to do something, or intending to do something soon: He looked as if he was about to burst into tears. I’m not about to apologize to him.

about

preposition, adjective, adverb [not gradable]  /əˈbɑʊt/ (also around) us  

about preposition, adjective, adverb [not gradable] (IN THIS PLACE)

positioned or moving in or near a place: Reporters stood about, waiting for more news.
(Definition of about from the Cambridge Academic Content Dictionary © Cambridge University Press)
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