(chiefly Brit.)a soft quilt filled with down, feathers, or a synthetic fibre, used instead of an upper sheet and blankets (主英)羽绒被 ■(亦作 duvet jacket)a thick down-filled jacket worn by mountaineers (登山运动员所穿的)羽绒服
语源
mid 18th cent.: from French, literally down' (see down)