To increase or expand rapidly.

"His stomach ballooned from eating such a large meal."

To go up or voyage in a balloon.

To take up in, or as if in, a balloon.

To inflate like a balloon.

To strike (a ball) so that it flies high in the air.

The act of something that swells or expands.

The sport or hobby of flying in a balloon.

"When he retired, he took up ballooning."

The mechanical kiting used by spiders, mites, caterpillars, etc. to travel through the air.

Growing rapidly as a balloon.

"The ballooning economy was out of control."

Rising high in the air.

"The cricketer hit a ballooning shot for six runs."