/ Dictionary / Index L Lucifer: Meaning and Definition of Find definitions for: Lu•ci•fer Pronunciation: (l'su-fur), [key] — n. a proud, rebellious archangel, identified with Satan, who fell from heaven. the planet Venus when appearing as the morning star. (l.c.) See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lucifer (Thesaurus) lucida luciferin Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language