0 a short coat made of denim (= a thick, strong cotton cloth, often blue, used especially for making jeans):
The black and red badge Marty wears on his denim jacket says "Art in Revolution".
A denim jacket will work with everything from your evening dress to skirts, trousers or even your sarong.
I tended to dress drably in black trousers, dark grey pullover and black denim jacket.
He's taken to dressing in young people's clothes. He wears denim jackets - with the collar up! - and sunglasses.
