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

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The team found that the supermassive black holes in these galaxies are rapidly feeding, or accreting, surrounding matter. Robert Lea, Space.com, 20 Jan. 2026 The supermassive black hole’s forces are unfathomably strong, but the influences of the giant galaxy cluster around it can’t be ignored either. Andrew Paul, Popular Science, 15 Jan. 2026 Correcting for this effect, the research team calculated that the black holes hidden within the LRDs ranged between 10,000 and 10 million solar masses—relative pipsqueaks compared with more mature supermassive black holes, which can tip the cosmic scales at billions of solar masses. Lee Billings, Scientific American, 14 Jan. 2026 These outflows are widely believed to be signs of activity from a supermassive black hole at the galaxy’s center. Rupendra Brahambhatt, Interesting Engineering, 10 Jan. 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 27 Jan. 2026.

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