lu·​mi·​nos·​i·​ty | \ ˌlü-mə-ˈnä-sə-tē How to pronounce luminosity (audio) \
plural luminosities

Definition of luminosity

1a : the quality or state of being luminous
b : something luminous
2a : 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)

Examples of luminosity in a Sentence

the luminosity of the fireflies made for an enchanting nighttime show
Recent Examples on the Web The pros advise against invasive or harsh treatments such as extractions, microneedling and peels, instead leaning into creating definition, luminosity, and the enhancement of natural beauty. Kiana Murden, Vogue, 4 May 2022 The first rung—that is, the one concerning the nearest cosmic objects—relies on geometric parallax to determine the distance to special stars called Cepheid variables, which pulsate in proportion to their intrinsic luminosity. Anil Ananthaswamy, Scientific American, 18 Apr. 2022 Both phenomena can easily surpass 100 billion times the sun’s luminosity. Scientific American, 1 Apr. 2022 Smooth lines and wrinkles and boost luminosity with this best-selling resurfacing treatment. Grooming Playbook, The Salt Lake Tribune, 10 Apr. 2022 Carrying his luminosity into the beige Bel-Air mansion, Smith the actor foretold the reconciliation of hip-hop with pop culture and the rise of the big-budget Black movie star. Doreen St. Félix, The New Yorker, 14 Mar. 2022 This moment of shine, of luminosity, is going to pass. Sonaiya Kelleystaff Writer, Los Angeles Times, 25 Mar. 2022 Then put some on your fingers, rub them together and pat the Miracle Balm onto your cheeks to add luminosity. Hannah Coates, Vogue, 1 Feb. 2022 Organic luminosity emanates the subtle vicissitudes of perceptual life, which enhances looking at art. Los Angeles Times, 11 Feb. 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.

First Known Use of luminosity

1634, in the meaning defined at sense 1a

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Time Traveler for luminosity

Time Traveler

The first known use of luminosity was in 1634

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Dictionary Entries Near luminosity



luminosity curve

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Statistics for luminosity

Last Updated

16 May 2022

Cite this Entry

“Luminosity.” Dictionary, Merriam-Webster, Accessed 20 May. 2022.

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More Definitions for luminosity


lu·​mi·​nos·​i·​ty | \ ˌlü-mə-ˈnäs-ət-ē How to pronounce luminosity (audio) \
plural luminosities

Medical Definition of luminosity

1 : the quality or state of being luminous
2a : 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

Nglish: Translation of luminosity for Spanish Speakers Encyclopedia article about luminosity


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