a large undulating mass of something, typically cloud, smoke, or steam 巨浪,浓烟,翻滚的云团,气浪 ■(archaic)a large sea wave (古)巨大的海浪
verb
[noobj., with adverbial of direction](of fabric) fill with air and swell outwards (衣物)鼓起 her dress billowed out around her. 她的衣服在身上鼓起来。 ■(of smoke, cloud, or steam) move or flow outward with an undulating motion (烟,云,蒸汽)翻腾,汹涌 smoke was billowing from the chimney-mouth. 烟雾从烟囱口涌出来。 [as adj. billowing]a billowing cloud. 翻滚的云团。