1. to burst forth or break out suddenly and violently
2. (of a volcano) to discharge lava, ash, and gases
3. (of skin) to break out in a rash or spots
Usage: medical

Examples

• The volcano erupted after being dormant for fifty years.
• Violence erupted in the streets after the announcement.
• Her skin erupted in hives after eating shellfish.
• The crowd erupted in cheers when the team scored.
• Laughter erupted from the classroom.
• The geyser erupts every hour on schedule.
• Protests erupted across the country.