/ Dictionary / Index P Picardy third: Meaning and Definition of Find definitions for: Pic'ardy third' Pronunciation: [key] — Music. Music. a major third in the final tonic chord of a composition written in a minor key. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Picardy picaresque Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language