billow
bil|low /b'ɪloʊ/ (billows billowing billowed)
1 [VERB] V, V out
When something made of cloth billows, it swells out and moves slowly in the wind.
The curtains billowed in the breeze...
Her pink dress billowed out around her.
2 [VERB] V prep/adv, V-ing
When smoke or cloud billows, it moves slowly upwards or across the sky.
Steam billowed out from under the bonnet.
...billowing clouds of cigarette smoke.
3 [N-COUNT] usu N of n
A billow of smoke or dust is a large mass of it rising slowly into the air.
...smoke stacks belching billows of almost solid black smoke.
= cloud
1 [VERB] V, V out
When something made of cloth billows, it swells out and moves slowly in the wind.
The curtains billowed in the breeze...
Her pink dress billowed out around her.
2 [VERB] V prep/adv, V-ing
When smoke or cloud billows, it moves slowly upwards or across the sky.
Steam billowed out from under the bonnet.
...billowing clouds of cigarette smoke.
3 [N-COUNT] usu N of n
A billow of smoke or dust is a large mass of it rising slowly into the air.
...smoke stacks belching billows of almost solid black smoke.
= cloud