/ Dictionary / Index L luminous energy: Meaning and Definition of Find definitions for: lu'minous en'ergy Pronunciation: [key] light (def. 2a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. luminous emittance luminous flux Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language