jacketjack‧et /ˈdʒækɪt/ ●●● noun [countable] 
1
a short light coat: 
a leather jacket a rain jacket2the part of a suit that covers the top part of your body3a stiff piece of folded paper that fits over the cover of a book to protect it [Origin: 1400–1500 French jaquet, from jaque “short coat”]
1 a short light coat: a leather jacket a rain jacket2the part of a suit that covers the top part of your body3a stiff piece of folded paper that fits over the cover of a book to protect it [Origin: 1400–1500 French jaquet, from jaque “short coat”]
