# luminosity

> English word · Noun · frequency rank #32,904

## Definitions
1. the state of being luminous, or a luminous object; brilliance or radiance
2. the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
3. The rate at which a star radiates energy in all directions.

## Etymology
Borrowed from French luminosité or else a native formation from luminous + -ity.

## Common misspellings (15)
`lluminosity`, `lmuinosity`, `luimnosity`, `luminnosity`, `luminoisty`, `luminositty`, `luminosityy`, `luminosiyt`, `luminossity`, `luminostiy`, `luminsoity`, `lumionsity`, `lumminosity`, `lumniosity`, `ulminosity`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/luminosity