/ ˈluːmɪnəs; NAmE / adjective
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
➡ note at bright
2.
very bright in colour :
They painted the door a luminous green.
➡ note at bright
► lu·mi·nous·ly adverb
► lu·mi·nos·ity / ˌluːmɪˈnɒsəti; NAmE -ˈnɑːs-/ noun [ sing. , U ]
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WORD ORIGIN
late Middle English : from Old French lumineux or Latin luminosus , from lumen , lumin- light.