|Origin:||, past participle of erumpere 'to burst out'|
if fighting, violence, noise etc erupts, it starts suddenly [= break out]:
Violence erupted after police shot a student during the demonstration.
A political row erupted over the MP's comments.
if a volcano erupts, it explodes and sends smoke, fire, and rock into the sky
if a place or situation erupts, there is a sudden increase in activity or emotion
They were angry to the point of erupting into riot.
Their conversations often erupted into squabbles.
to suddenly start laughing, shouting etc:
He erupted into loud, desperate sobs.
if spots erupt on your body, they suddenly appear on your skin
—eruption noun [uncountable and countable]
a volcanic eruption
the eruption of violence