as in brightness
the quality or state of having or giving off light
the luminosity of the fireflies made for an enchanting nighttime show
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Recent Examples of luminosity
Rose and lotus extracts add extra luminosity, while natural vitamin E provides antioxidant support.
—
Christa Joanna Lee, Allure, 23 Jan. 2026
One of the imaged novas, V1674 Herculis, proved to be one of the fastest novas on record, reaching peak luminosity before fading in just several days.
—Frank Landymore, Futurism, 21 Jan. 2026
Data collected over years have shown that Betelgeuse’s luminosity varies about every 416 days, growing fainter and then brighter.
—Ashley Strickland, CNN Money, 20 Jan. 2026
When an orbiting planet crosses the Earth-facing side of its parent star, a bit of the light from the star is temporarily blocked, reducing overall luminosity by a tiny but detectable amount.
—Jeffrey Kluger, Time, 2 Jan. 2026
See All Example Sentences for luminosity
Christa Joanna Lee, Allure, 23 Jan. 2026
One of the imaged novas, V1674 Herculis, proved to be one of the fastest novas on record, reaching peak luminosity before fading in just several days.
—Frank Landymore, Futurism, 21 Jan. 2026
Data collected over years have shown that Betelgeuse’s luminosity varies about every 416 days, growing fainter and then brighter.
—Ashley Strickland, CNN Money, 20 Jan. 2026
When an orbiting planet crosses the Earth-facing side of its parent star, a bit of the light from the star is temporarily blocked, reducing overall luminosity by a tiny but detectable amount.
—Jeffrey Kluger, Time, 2 Jan. 2026
See All Example Sentences for luminosity
Recent Examples of Synonyms for luminosity
Noun
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The Kickstarter campaign is also offering a slightly less capable model that's ticks all of the above boxes except for brightness, which comes in at 2,600 ISO lumens for the Pro variant.—
New Atlas,
New Atlas,
10 Feb. 2026
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Giving the camera longer exposure increases brightness but may reduce definition if the aurora is active.—
Lydia Price,
Travel + Leisure,
10 Feb. 2026
Noun
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So, astronomers have come up with a compromise regarding the geometry of the sun's illumination angle on Venus' disk versus its distance from Earth to determine the time of Venus' greatest brilliancy.—
Joe Rao,
Space.com,
4 Apr. 2025
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Family circles will have wrapped themselves in the holy pleasures of the great occasion, and everywhere the grand old holiday will have been introduced with all the majesty and brilliancy which clings around the hallowed name of Christmas.—
Michael Barnes,
Austin American-Statesman,
23 Dec. 2024
Noun
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Basketball brilliance turned this frigid afternoon into a hot Fudd Sunday.—
Voice of the People,
New York Daily News,
3 Feb. 2026
-
Melissa Ruggieri The emerging brilliance of Olivia Dean was not only recognized by Grammy voters, who awarded her best new artist, but by legendary music mogul Clive Davis.—
Melissa Ruggieri,
USA Today,
2 Feb. 2026
Noun
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Rather than allowing its typical lightness, Benning layers their brushstrokes purposefully so as to establish new kinds of relationships, both pictorial and material.—
Alex Bacon,
Artforum,
10 Feb. 2026
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Instead, there's a certain lightness to February's feels.—
Calin Van Paris,
InStyle,
8 Feb. 2026
Cite this Entry
“Luminosity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/luminosity. Accessed 14 Feb. 2026.
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