What is the meaning of erupt?

verb

• Start abruptly.
  • usage: "After 1989, peace broke out in the former East Bloc"
  • synonyms: break out
• Erupt or intensify suddenly.
  • usage: "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
  • synonyms: irrupt, flare up, flare, break open, burst out
• Start to burn or burst into flames.
  • usage: "Marsh gases ignited suddenly"; "The oily rags combusted spontaneously"
  • synonyms: ignite, catch fire, take fire, combust, conflagrate
• Break out.
  • usage: "The tooth erupted and had to be extracted"
  • synonyms: come out, break through, push through
• Become active and spew forth lava and rocks.
  • usage: "Vesuvius erupts once in a while"
  • synonyms: belch, extravasate
• Force out or release suddenly and often violently something pent up.
  • usage: "break into tears"; "erupt in anger"
  • synonyms: break, burst
• Appear on the skin.
  • usage: "A rash erupted on her arms after she had touched the exotic plant"
• Become raw or open.
  • usage: "He broke out in hives"; "My skin breaks out when I eat strawberries"; "Such boils tend to recrudesce"
  • synonyms: recrudesce, break out