white dwarf

noun

plural white dwarfs
: a small hot whitish star of low intrinsic brightness usually with a mass approximately equal to that of the sun but with a density many times larger

Examples of white dwarf in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
But a major reason why experts have difficulty finding binary star white dwarfs is because of their trademark ultraviolet emissions. Andrew Paul Aug 6, Popular Science, 6 Aug. 2025 Astronomers have discovered a rare pair of white dwarfs destined to explode in a spectacular supernova in Earth’s cosmic neighborhood. Margherita Bassi, Smithsonian Magazine, 9 Apr. 2025 Once the two stars get to the point of no return, mass will shift from one white dwarf to the other. Paul Smaglik, Discover Magazine, 4 Apr. 2025 Using the largest catalog of exploding white dwarf vampire stars ever gathered has provided further evidence that dark energy, the mysterious force accelerating the expansion of the universe, is getting weaker. Robert Lea, Space.com, 24 July 2025 See All Example Sentences for white dwarf

Word History

First Known Use

1922, in the meaning defined above

Time Traveler
The first known use of white dwarf was in 1922

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Cite this Entry

“White dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/white%20dwarf. Accessed 20 Aug. 2025.

Kids Definition

white dwarf

noun
: a small whitish star of low brightness that has a mass approximately equal to that of the sun but that is many times more dense

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