1. Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous colour. Fire burneth wood, making it . . . Luminous. (Bacon) The mountains lift . . . Their lofty and luminous heads. (Longfellow)
3. Enlightened; intelligent; also, clear; intelligible; as, a luminous mind. luminous eloquence. . a luminous statement. luminous paint, a paint made up with some phosphorescent substance, as sulphide of calcium, which after exposure to a strong light is luminous in the dark for a time.
Synonym: lucid, clear, shining, perspicuous.