: a region at the center of a galaxy that produces an extremely large amount of radiation
Examples of quasar in a Sentence
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In other words, this quasar appears older than its years.
—
Keith Cooper,
Space.com,
12 June 2026
The team spotted the distant quasar, an actively feeding supermassive black hole, using observations from the Subaru Telescope.
—
Georgina Jedikovska,
Interesting Engineering,
23 Jan. 2026
See All Example Sentences for quasar
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Keith Cooper,
Space.com,
12 June 2026
The team spotted the distant quasar, an actively feeding supermassive black hole, using observations from the Subaru Telescope.
—
Georgina Jedikovska,
Interesting Engineering,
23 Jan. 2026
See All Example Sentences for quasar
Cite this Entry
“Quasar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quasar. Accessed 2 Jul. 2026.
Copy CitationKids Definition
quasar
noun
qua·sar
ˈkwā-ˌzär 
also -ˌsär
: any of the very distant starlike heavenly objects that give off very strong blue and ultraviolet light and powerful radio waves
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