Definition of supervolcano in US English:

supervolcano

noun

  • An unusually large volcano having the potential to produce an eruption with major effects on the global climate and ecosystem.

    ‘the possibility of a supervolcano erupting is terrifying, but the odds are fairly long against it happening in our lifetimes’
    • ‘Flows from a supervolcano would scorch and destroy all life around the volcano in an area the size of an English county or small American state.’
    • ‘When supervolcanoes erupt they do so with a force thousands of times greater than eruptions such as that at Mount Vesuvius.’
    • ‘The park's supervolcano has the potential to erupt with a force about 2,000 times the size of Mount St. Helens, according to a new study.’
    • ‘Montana isn't going to cut it when the Yellowstone supervolcano blows.’
    • ‘There is enough volcanic material below the surface to match the largest of the supervolcano's three eruptions over the last 2.1 million years, Farrell said.’
    • ‘The eruption of the supervolcano Toba approximately 74,000 years ago is thought to have wiped out much of our genetic diversity by causing the extinction of many human groups.’
    • ‘Supervolcanos could cause major problems but then are we going to move people out of the area?’
    • ‘A supervolcano would release enough to cover the entire UK under four metres of ash.’
    • ‘Unlike ordinary volcanoes, supervolcanoes are not obvious from the surface.’
    • ‘Yellowstone, if it did go up as a supervolcano, would put out about 2000 cubic kilometres of material into the atmosphere and into the environment.’

Pronunciation

supervolcano

/ˈso͞opərvälˌkānō/