/ Dictionary / Index L Lucius I: Meaning and Definition of Find definitions for: Lu•ci•us I Pronunciation: (l'shē-us, -shus), [key] died a.d. 254, pope 253–254. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lucius Lucius II Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language