1 shining in the dark; giving out light:
luminous paint * luminous hands on a clock * staring with huge luminous eyes * (figurative) the luminous quality of the music
2 very bright in colour:
They painted the door a luminous green.
luminously adverb:
Her eyes were large and luminously black.
luminosity noun [sing.,U]:
The moon was shining enough to give a ghostly luminosity to the buildings that crowded both sides of the narrow street.
