supermassive

adjective

su·​per·​mas·​sive ˌsü-pər-ˈma-siv How to pronounce supermassive (audio)
: having a very large mass : extremely or extraordinarily massive
a supermassive black hole

Examples of supermassive in a Sentence

Recent Examples on the Web
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Could early, supermassive stars be the unified solution? Ethan Siegel, Big Think, 2 Sep. 2025 Powered by matter falling into supermassive black holes, these objects can blast blobs of gas away from the galaxy at speeds approaching that of light. Phil Plait, Scientific American, 29 Aug. 2025 Thanks to a theory put forward by Albert Einstein over 100 years ago and a happy coincidence, astronomers have discovered radiation being pumped out from the core of a quasar — within which a supermassive black hole lurks. Robert Lea, Space.com, 27 Aug. 2025 Every galaxy in the universe has a supermassive black hole at its center, with larger galaxies having larger ultra-massive black holes, scientists think. Jamie Carter, Forbes.com, 21 Aug. 2025 See All Example Sentences for supermassive

Word History

First Known Use

1937, in the meaning defined above

Time Traveler
The first known use of supermassive was in 1937

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Cite this Entry

“Supermassive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/supermassive. Accessed 10 Sep. 2025.

Last Updated: - Updated example sentences
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