The phrasal verb "break out" is predominantly used in informal contexts, though it can appear in more formal speech or writing, particularly in journalistic or academic reports about events. "Break out" often describes the sudden onset of an event or situation, such as a fire, war, disease, or even laughter, effectively conveying spontaneity and urgency. It can also refer to someone escaping confinement or something emerging suddenly. For example, 'A riot broke out at the concert,' or 'She broke out in laughter.' This versatility in describing both positive and negative sudden occurrences makes it a valuable term in narrative settings. Generally, when "break out" is used with a noun (e.g., 'breakout session'), it denotes separation into smaller parts for a focused engagement, though in another context, it can also refer to sudden fame or a rise in popularity.
B1
PreIntermediate
1. To start suddenly, especially of something dangerous or unpleasant.
The fire broke out in the middle of the night, causing the building to evacuate immediately.
Violence broke out after the match, resulting in several injuries.
2. To escape from a place or situation.
The prisoners managed to break out of jail last night.
Several animals broke out of the zoo after a fence was damaged during the storm.
3. To develop a skin eruption, especially pimples.
She tends to break out in hives when she's stressed.