Definition of super-eruption in US English:

super-eruption

noun

  • 1Dentistry. = overeruption.

  • 2Geology. A volcanic eruption of exceptionally great power; the eruption of a supervolcano.

Origin

Early 20th century. From super- + eruption. In later use in sense 2 perhaps influenced by supervolcano (which is first attested slightly later).