/ Dictionary / Index L luthern: Meaning and Definition of Find definitions for: lu•thern Pronunciation: (l'thurn), [key] — n. a dormer window. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lutheran Lutherville-Timonium 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