luminosity

noun
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)

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Examples of luminosity in a Sentence

the luminosity of the fireflies made for an enchanting nighttime show
Recent Examples on the Web Over the course of his life, Baldwin wrote rhapsodically about many friends, especially those in the civil rights movement, but his recollections of Hansberry, who died in 1965 at 34 of pancreatic cancer, had an unparalleled luminosity and joy. New York Times, "The People James Baldwin Knew," 11 Dec. 2020 The astronomers are studying the super novae, stars of ordinary or minor brilliance that suddenly burst into tremendous luminosity for no apparent reason. Popular Mechanics Editors, Popular Mechanics, "The Wonders of Astronomy: The Cutting Edge Space Telescope...of 1939," 17 Dec. 2020 Over the course of his life, Baldwin wrote rhapsodically about many friends, especially those in the civil rights movement, but his recollections of Hansberry, who died in 1965 at 34 of pancreatic cancer, had an unparalleled luminosity and joy. New York Times, "The People James Baldwin Knew," 11 Dec. 2020 Over the course of his life, Baldwin wrote rhapsodically about many friends, especially those in the civil rights movement, but his recollections of Hansberry, who died in 1965 at 34 of pancreatic cancer, had an unparalleled luminosity and joy. New York Times, "The People James Baldwin Knew," 11 Dec. 2020 Unlike some moisture boosters that penetrate skin, polyglutamic acid is a larger molecule that sits on top, which helps skin glow and increases luminosity (like a natural highlighter!). Katie Berohn, Good Housekeeping, "Everything You Need to Know About Polyglutamic Acid, Your Skin's New Hero Hydrator," 29 Dec. 2020 Visual artists can manipulate attributes of a work of art such as luminosity in order to direct visual gaze to specific features of a painting. Robert Martone, Scientific American, "When Our Gaze Is a Physical Force," 29 Dec. 2020 Over the course of his life, Baldwin wrote rhapsodically about many friends, especially those in the civil rights movement, but his recollections of Hansberry, who died in 1965 at 34 of pancreatic cancer, had an unparalleled luminosity and joy. New York Times, "The People James Baldwin Knew," 11 Dec. 2020 Over the course of his life, Baldwin wrote rhapsodically about many friends, especially those in the civil rights movement, but his recollections of Hansberry, who died in 1965 at 34 of pancreatic cancer, had an unparalleled luminosity and joy. New York Times, "The People James Baldwin Knew," 11 Dec. 2020

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.

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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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Statistics for luminosity

Last Updated

21 Feb 2021

Cite this Entry

“Luminosity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/luminosity. Accessed 28 Feb. 2021.

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More Definitions for luminosity

luminosity

noun
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

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Comments on luminosity

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