Meaning of “jacket” in the English Dictionary

"jacket" in English

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jacketnoun [ C ]

uk /ˈdʒæk.ɪt/ us /ˈdʒæk.ɪt/

jacket noun [ C ] (CLOTHES)

A1 a short coat:

The keys are in my jacket pocket.

More examples

jacket noun [ C ] (COVER)

→  dust jacket

US UK sleeve a cover to protect something:

Can you put the record back in its jacket, please?

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

"jacket" in American English

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jacketnoun [ C ]

us /ˈdʒæk·ɪt/

jacket noun [ C ] (CLOTHING)

a short coat:

a leather/denim jacket
a suit/sports jacket

jacket noun [ C ] (COVERING)

an outer cover that protects something:

the book jacket

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