Definition of red dwarf in US English:

red dwarf


  • A small, old, relatively cool star.

    • ‘In some respects, searching for planets around red dwarfs is harder than around heavier, hotter stars.’
    • ‘This list is being added to as astronomers discover new red dwarfs and other small stars - which are still many times bigger than Jupiter and may possess planets.’
    • ‘Despite the fact that red dwarfs are relatively cool, the small orbit means that temperatures on this world are extra toasty - several hundred degrees Celsius.’
    • ‘It was hoped that this dark matter would be mostly in the form of small stars called red dwarfs.’
    • ‘The newfound planet's host star is a red dwarf with about one-fifth the mass of our sun.’


red dwarf

/ˈˌred ˈdwôrf//ˈˌrɛd ˈdwɔrf/