/ Dictionary / Index L Luth.: Meaning and Definition of Find definitions for: Luth. Pronunciation: [key] Lutheran. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lutetium Luther 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