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e·rupt / iˈrəpt/ • v. [intr.] (of a volcano) become active and eject lava, ash, and gases. ∎  be ejected from an active volcano: hot lava erupted from the crust. ∎  (of an object) explode with fire and noise resembling an active volcano: smoke bombs erupted everywhere. ∎  break out or burst forth suddenly and dramatically: fierce fighting erupted between the army and guerrillas. ∎  give vent to anger, enthusiasm, amusement, or other feelings in a sudden and noisy way: the soldiers erupted in fits of laughter. ∎  (of a pimple, rash, or other prominent mark) suddenly appear on the skin. ∎  (of the skin) suddenly develop such a pimple, rash, or mark. ∎  (of a tooth) break through the gums during normal development.

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