billow
noun
[ ˈbɪləʊ ]
• a large undulating mass of something, typically cloud, smoke, or steam.
billow
verb
• (of fabric) fill with air and swell outwards.
• "her dress billowed out around her"
Similar:
puff up/out,
balloon (out),
swell,
fill out,
bulge out,
belly out,
Origin:
mid 16th century: from Old Norse bylgja .
