To burst forth suddenly and violently, often with force or noise. The volcano erupted, spewing lava and ash into the sky.
To break out or appear suddenly and dramatically. Laughter erupted from the audience after the comedian's joke.
To become suddenly active or violent. Protests erupted in the city following the controversial decision.
To release or discharge something suddenly and forcefully. The pipe erupted, flooding the basement with water.
Of a tooth, rash, or similar, to break through or appear on the surface of the gums or skin. Her skin erupted in a red rash after the allergic reaction.