"Burst out" is a phrasal verb that is more commonly used in informal speech and writing than in formal contexts. It typically conveys a sudden and often uncontrollable action, such as laughter or crying; for example, one might "burst out laughing" or "burst out crying". The phrasal verb suggests immediacy and intensity, highlighting a spontaneous emotional response or reaction. It is also used to describe sudden, forceful speech, as in "burst out with a comment". In narrative contexts, "burst out" can also indicate a character entering or exiting with an abrupt movement, contributing to vibrant storytelling detail. Overall, "burst out" is employed to vividly convey explosive or unexpected actions and emotional expressions.
B1
Intermediate
1. To start doing something suddenly, often laughter or yelling.
She burst out laughing when she saw his silly costume.
As soon as he heard the joke, John burst out in laughter.
The audience burst out cheering when the performer took the stage.
He burst out crying after receiving the bad news.
2. To emerge from a place suddenly or with force.
The dog burst out of the house when the door was opened.
She burst out of the room in a hurry.
The sun burst out from behind the clouds, lighting up the whole valley.
The children burst out of the classroom as soon as the bell rang.