jack·et 
/ˈʤækət/ noun
plural jack·ets /ˈʤækət/ noun [count] 1 : a piece of clothing that is worn on your upper body over another piece of clothing (such as a shirt) : a usually short and light coat
▪ a suit with a double-breasted jacket ▪ a warm jacket — see color picture; see also dinner jacket, flak jacket, life jacket, sports jacket, straitjacket 2 : an outer covering: such as a : a paper cover that protects a book and that can be removed : dust jacket
b chiefly US : a paper, cardboard, or plastic envelope for holding a record, CD, or DVD —called also sleeve
▪ a suit with a double-breasted jacket ▪ a warm jacket — see color picture; see also dinner jacket, flak jacket, life jacket, sports jacket, straitjacket
b chiefly US : a paper, cardboard, or plastic envelope for holding a record, CD, or DVD —called also sleeve
— see also yellow jacket
