luminosity

noun

lu·​mi·​nos·​i·​ty ˌlü-mə-ˈnä-sə-tē How to pronounce luminosity (audio)
plural luminosities
1
a
: the quality or state of being luminous
b
: something luminous
2
a
: the relative quantity of light
b
: relative brightness of something
3
: the relative quantity of radiation emitted by a celestial source (such as a star)

Example Sentences

the luminosity of the fireflies made for an enchanting nighttime show
Recent Examples on the Web Light Liquid Luminizer Highlight was applied to the high points of the face (think: cheekbones, temples, and the bridge of the nose) to build the luminosity, followed by a spritz of face mist. Kiana Murden, Vogue, 13 Sep. 2022 Instead of traditional highlighter, try a skincare-makeup hybrid that boosts skin's luminosity right away and over time. Tiffany Dodson, Harper's BAZAAR, 30 Sep. 2022 Arthur’s death did ultimately lead you to a place where life has taken on a kind of religious luminosity that wasn’t there before. David Marchese, New York Times, 11 Sep. 2022 The new work was focused on examining the luminosity function of galaxies that formed shortly (in astronomical terms) after the Big Bang. John Timmer, Ars Technica, 26 July 2022 The wand uses red light therapy to rejuvenate the skin's natural luminosity and improve some fine lines and wrinkles. Alex Warner, PEOPLE.com, 12 July 2022 Perhaps that’s why one of the most popular new-generation dumb phones, the Light Phone, opts for the language of luminosity and its association with intellectual brilliance. Wired, 28 July 2022 Meanwhile physicists have boosted their detectors to keep pace with an increased number of collisions resulting from the higher luminosity. Daniel Garisto, Scientific American, 27 Apr. 2022 Moments of flatness and luminosity continue in the subdued and tranquil entryway. Laura Raskin, ELLE Decor, 10 Aug. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'luminosity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1634, in the meaning defined at sense 1a

Time Traveler
The first known use of luminosity was in 1634

Dictionary Entries Near luminosity

Cite this Entry

“Luminosity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/luminosity. Accessed 5 Dec. 2022.

Kids Definition

luminosity

noun

lu·​mi·​nos·​i·​ty ˌlü-mə-ˈnäs-ət-ē How to pronounce luminosity (audio)
plural luminosities
1
: the quality or state of being luminous : brightness
2
: something luminous

Medical Definition

luminosity

noun

lu·​mi·​nos·​i·​ty ˌlü-mə-ˈnäs-ət-ē How to pronounce luminosity (audio)
plural luminosities
1
: the quality or state of being luminous
2
a
: the relative quantity of light
b
: the comparative degree to which light of a given wavelength induces the sensation of brightness when perceived

More from Merriam-Webster on luminosity

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