Meaning of luminance

lu•mi•nance

Pronunciation: (l'mu-nuns), [key]
— n.
  1. the state or quality of being luminous.
  2. the quality or condition of radiating or reflecting light: the blinding luminance of the sun.
  3. the quantitative measure of brightness of a light source or an illuminated surface, equal to luminous flux per unit solid angle emitted per unit projected area of the source or surface.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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