The cloud swelled against the membrane, spreading it ever thinner around an expanding volume of ionized and agitated gas.

MacDonald pursed his lips and glanced at the horizon, where dark clouds swelled just beyond the shoulder of the mountain.

The clouds and the mountains ahead swelled.

The cloud swelled, and a painted wooden lightning jag flew from it, followed by an explosive boom of thunder.

The black cloud swelled up dangerously, emitting a warning peal of thunder.

Where a rosy cloud swelled from one of them, rapidly fading away into blackness, a ship and her crew had died.

We saw an almighty battle in orbit before the red cloud swelled over the sky.

The tiny cloud swelled and faded very slowly.

I took a picture of him as the cloud of dust and debris swelled.

But that black cloud on the western rim writhed and billowed, swelling and expanding.