/ ˈdenɪm; NAmE / noun
1.
[ U ] a type of strong cotton cloth that is usually blue and is used for making clothes, especially jeans :
a denim jacket
ORIGIN: From the French serge de Nîmes , meaning serge (a type of cloth) from the town of Nîmes.
2.
denims [ pl. ] ( old-fashioned ) trousers / pants made of denim
SYN jeans