/luːmɪˈnɒsɪti/ Loo-mi-NAH-si-tee

Definitions

1. noun

The state or quality of being luminous; the amount of light given off by a star, object, etc.

“The increased luminosity of the star indicates a rise in its surface temperature.”

2. noun

The quality or state of being radiant or brilliant

“The luminosity of her smile lit up the entire room.”

3. noun

The quality or state of being enlightened or illuminated

“The city’s luminosity at night made it a beautiful sight to behold.”

4. noun

A measure of the amount of light emitted by a celestial body

“Astronomers used advanced technology to measure the luminosity of a distant galaxy.”