Definition of “jacket” - Learner’s Dictionary

jacket

noun [ C ] us uk /ˈdʒækɪt/
Extra Examples
a waterproof jacket with a hooda jacket lined with fura lightweight jacket for the summera black velvet jacketHe zipped up his jacket.

A2 a short coat:

a leather jacket
→ See also dinner jacket , life jacket , strait-jacket

(Definition of “jacket” from the Cambridge Learner's Dictionary © Cambridge University Press)