/ Dictionary / Index L luminous paint: Meaning and Definition of Find definitions for: lu'minous paint' Pronunciation: [key] paint containing a phosphor that emits visible light when irradiated with ultraviolet light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. luminous intensity luminous range Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language