The verb erupt has 8 senses (first 5 from tagged texts)
1. (6) erupt, break out -- (start abruptly; "After 1989, peace broke out in the former East Bloc")
2. (2) erupt, irrupt, flare up, flare, break open, burst out -- (erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism")
3. (1) erupt, ignite, catch fire, take fire, combust, conflagrate -- (start to burn or burst into flames; "Marsh gases ignited suddenly"; "The oily rags combusted spontaneously")
4. (1) erupt, come out, break through, push through -- (break out; "The tooth erupted and had to be extracted")
5. (1) erupt, belch, extravasate -- (become active and spew forth lava and rocks; "Vesuvius erupts once in a while")
6. break, burst, erupt -- (force out or release suddenly and often violently something pent up; "break into tears"; "erupt in anger")
7. erupt -- (appear on the skin; "A rash erupted on her arms after she had touched the exotic plant")
8. erupt, recrudesce, break out -- (become raw or open; "He broke out in hives"; "My skin breaks out when I eat strawberries"; "Such boils tend to recrudesce")