erupt - definition in the American English Dictionary - Cambridge Dictionaries Online

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erupt

verb [I]  us   /ɪˈrʌpt/
to burst out suddenly or explode: The crowd erupted in cheers. The building erupted in flames when the plane struck it. earth science If a volcano (= type of mountain) erupts, it begins to throw out hot rocks and burning substances.
eruption
noun [C]  us   /ɪˈrʌp·ʃən/
(Definition of erupt from the Cambridge Academic Content Dictionary © Cambridge University Press)
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