red giant
noun
: a star that has low surface temperature and a diameter that is large relative to the sun
Examples of red giant in a Sentence
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Then in the future, when the binary star component enters the red giant phase, long after the outer star has become a compact white dwarf, the mass transfer could begin again in the opposite direction, with matter falling onto the surface of the white dwarf.
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Keith Cooper, Space.com, 3 June 2026
Arcturus is considered a red giant star, around 22 million miles in diameter.
—Mike Lynch, Twin Cities, 31 May 2026
From the outside, a black hole star would look much like a red giant star: a glowing, swollen ball of ionized gas.
—Joseph Howlett, Scientific American, 27 May 2026
Supercomputer simulations have helped astronomers solve a decades-old mystery about red giant stars.
—Neetika Walter, Interesting Engineering, 21 Feb. 2026
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Keith Cooper, Space.com, 3 June 2026
Arcturus is considered a red giant star, around 22 million miles in diameter.
—Mike Lynch, Twin Cities, 31 May 2026
From the outside, a black hole star would look much like a red giant star: a glowing, swollen ball of ionized gas.
—Joseph Howlett, Scientific American, 27 May 2026
Supercomputer simulations have helped astronomers solve a decades-old mystery about red giant stars.
—Neetika Walter, Interesting Engineering, 21 Feb. 2026
See All Example Sentences for red giant
Cite this Entry
“Red giant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20giant. Accessed 6 Jun. 2026.
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