1. To emerge violently from restraint or limits; to explode: "My neighbor erupted in anger over the noise."
2. To become violently active: "The volcano erupted after years of dormancy."
3. To force out or to release something; such as, steam, with violence or suddenness.
4. To suddenly appear on the skin; such as, a rash or blemish.
5. A sudden explosion that sent out rocks, ash, lava, etc.: "The volcano erupted with tremendous force."
6. Something that came out in a sudden explosion: "Steam erupted from the geyser."
7. That which happened or started suddenly and violently: "A bitter dispute erupted among the members of the football team."
8. Something that started suddenly; such as, shouting or applauding: "The audience erupted in applause when she finished her speech."
9. Appeared suddenly on the skin: "A rash erupted on his back."