a large undulating mass of something, typically cloud, smoke, or steam.
archaic a large sea wave.
ზმნა
Universal
(of fabric) fill with air and swell outwards:her dress billowed out around her (as adjective billowing)a billowing skirt and shirt
(of smoke, cloud, or steam) move or flow outward with an undulating motion:smoke was billowing from the chimney-mouth (as adjective billowing)all I could see was thick, billowing smoke
