luminosity.
the state of being luminous, or a luminous object; brilliance or radiance
Meaning & usage
the state of being luminous, or a luminous object; brilliance or radiance
the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
The rate at which a star radiates energy in all directions.
Where this word comes from
Borrowed from French luminosité or else a native formation from luminous + -ity.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.