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Definition of luminosity

luminosity

/ˌluː.mɪˈnɑː.sə.ti/
lu · mi · nos · i · ty
Adverb:luminously
•
Plural:luminosities
•
Adjective:luminous
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luminosity Lexical Profile

luminosity Game Scores & Validity

• noun

1

The quality or condition of emitting or reflecting bright light; radiance or brilliance.

Example

"The artist used thin glazes of oil paint to give the portrait a remarkable luminosity."

2

In astronomy, the intrinsic brightness of a celestial object, measured as the total amount of energy it radiates per unit of time.

Example

"Astronomers calculate the distance to certain variable stars by comparing their intrinsic luminosity to their apparent brightness."

Synonyms
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Antonyms
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• Rhymes for luminosity

• Nearby Words

luminary
luminescence
luminescent
luminosity
luminous
luminously
lump

Word Origin & Etymology

Borrowed from Late Latin luminositas, derived from Latin luminosus ('full of light'), from lumen ('light').

Cite this Entry

Wordmom. (2026). Definition of Luminosity. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/luminosity
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