Swell out

Pronunciation: /ˈswɛɫ ˈaʊt/

Swell out (verb)

  1. To become larger and fuller, often quickly, because of pressure, heat, or liquid inside.
  2. To expand from a smaller shape to a wider one, filling more space around.
  3. To increase in volume or size as a result of growth or accumulation over time.

Examples

  • The balloon swelled out quickly.
  • The crowd swelled out when the music started.