Definition of jacket noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈdʒækɪt//
    ; NAmE NAmE//ˈdʒækɪt//
    Parts of a book, Clothes
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  1. 1   a piece of clothing worn on the top half of the body over a shirt, etc. that has sleeves and fastens down the front; a short, light coat a denim/tweed jacket I have to wear a jacket and tie to work. see also bomber jacket, dinner jacket, donkey jacket, flak jacket, life jacket, smoking jacket, sports jacket, straitjacket See related entries: Clothes
  2. 2(also dust jacket) a loose paper cover for a book, usually with a design or picture on it See related entries: Parts of a book
  3. 3an outer cover around a hot water pipe, etc., for example to reduce loss of heat
  4. 4(British English) the skin of a baked potato potatoes baked in their jackets
  5. 5(especially North American English) = sleeve (3)
  6. Word Originlate Middle English: from Old French jaquet, diminutive of jaque; origin uncertain, perhaps based on Arabic.Extra examples A light cotton jacket was draped over her shoulders. Gentlemen are requested to wear a jacket and tie for dinner. He pulled his passport from his inside jacket pocket. He wore a tweed sports jacket. His jacket hung over the back of his chair. She shrugged her shoulders into her jacket. a linen/​suede/​tweed jacket a padded sleeveless jacket bomber jacket dinner jacket ski jacket
See the Oxford Advanced American Dictionary entry: jacket