Definition of flare star in English:

flare star

noun

Astronomy
  • A dwarf star which displays spasmodic outbursts of radiation, believed to be due to extremely intense flares.

    • ‘These stars, called flare stars, can erupt as often as every few hours, and with an intensity far greater than flares from our sun.’
    • ‘The nearest example of a flare star is none other than Proxima Centauri, the nearest star to the Sun.’