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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Highlighted at the center of the galaxy by a bright white glow, for instance, is IC 486's active galactic nucleus (AGN), the center of the galaxy and an active supermassive black hole. Chelsea Gohd, Space.com, 17 Apr. 2026 As even the most supermassive black holes will inevitably decay into radiation, the entropy will remain largely constant during that process, only increasing slightly. Big Think, 9 Apr. 2026 Launching as soon as 2035, LISA could sense waves from much more massive mergers of supermassive black holes rather than the waves from puny 50-stellar-mass black holes that are within LIGO’s purview. Joseph Howlett, Scientific American, 8 Apr. 2026 That said, the dual jet emissions remain the strongest evidence so far that supermassive black holes grow by combining forces. Andrew Paul, Popular Science, 8 Apr. 2026 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 28 Apr. 2026.

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