intr.v. e·rupt·ed, e·rupt·ing, e·rupts 1. a. To throw or force something out violently, as lava, ash, and gases: The volcano erupted. b. To be thrown or forced out: Water erupted from the geyser. 2. To develop suddenly: Violence erupted during the protests. 3. To express oneself suddenly and loudly: He erupted in anger. 4. a. To break through the gums in developing. Used of teeth. b. To appear on the skin. Used of a rash or blemish. [Latin ērumpere, ērupt- : ē-, ex-, ex- + rumpere, to break; see reup- in the Appendix of Indo-European roots.] e·ruptive adj. e·ruptive·ly adv. |
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