/ Dictionary / Index L Lydian mode: Meaning and Definition of Find definitions for: Lyd'ian mode' Pronunciation: [key] — Music. Music. an authentic church mode represented on the white keys of a keyboard instrument by an ascending scale from F to F. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lydian lye Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language