- Luminosity is defined as the condition of being bright or having light.
An example of something with luminosity is the sun.
- the quality or condition of being luminous
- pl. luminosities something luminous
Origin of luminosityMedieval Latin luminositas
- The condition or quality of being luminous.
- Something luminous.
- The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength. Also called luminosity factor.