luminosity noun3 •the state of being luminous, or a luminous object; brilliance or radianceThey reported encountering a luminosity of great intensity and loving angelic beings. — 1994 •The rate at which a star radiates energy in all directions.We recognize the same pattern as in the left panel, with dM stars being much less frequent flarers than dMe stars of similar luminosity. — 2012 •the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor formsluminosities
