eruption
nounUK /ɪˈrʌp.ʃən/
US /ɪˈrʌp.ʃən/
A volcano erupting is when hot rock and fire burst out of a mountain.
The eruption sent a huge cloud of ash into the sky.
OTHER MEANINGS
2. A sudden start of something unpleasant, like a fight or a disease.
The school had an eruption of flu cases last winter.
3. A sudden loud burst of sound or emotion.
Her eruption of laughter surprised everyone in the room.
4. A spot or rash that suddenly appears on the skin.
The doctor said the red spots were a skin eruption.