mantle1 /'maentl; 'maentl/ n 1 loose, sleeveless. cloak; (fig) covering: '無袖外套; 斗篷; (喻)覆蓋物： hills with a ~ of snow. 覆著一層雪的山。. 2 lace-like cover fixed round the flame of a gas lamp and becoming incandescent, to provide bright light. (裝于煤氣燈火焰四周使燈光明亮的)白熱紗罩; 燃罩。