Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: French
Origin: jaquet, from jaque 'short coat', probably from jacque 'poor farmer', from the male name Jacques 'James'

jacket

noun
     
jacket
jack‧et S2 W3 [countable]
2 the part of a suit that covers the top part of your body:
Gene has to wear a jacket and tie to work.
tweed jackets
sports jacket
3TCN a stiff piece of folded paper that fits over the cover of a book to protect it [= dust jacket]
4 American EnglishTCRD a stiff paper cover that protects a record [= sleeve British English]
5 a cover that surrounds and protects some types of machines

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