erupt

verb

• 1 [no object] (of a volcano) become active and eject lava, ash, and gases:Mount Pinatubo began erupting in June
• be ejected from an active volcano:hot lava erupted from the crust
• (of an object) explode with fire and noise:smoke bombs erupted everywhere

• 2break out suddenly and dramatically:fierce fighting erupted between the army and guerrillas noise erupted from the drawing room

• 3give vent to anger, amusement, etc. in a sudden and noisy way:the soldiers erupted in fits of laughter

• 4(of a spot, rash, or other mark) suddenly appear on the skin: a boil had erupted on her temple
• (of the skin) suddenly develop a spot, rash, or mark: his skin erupts with hives

• 5(of a tooth) break through the gums during normal development: the lower incisors had erupted