/ Dictionary / Index D double quatrefoil: Meaning and Definition of Find definitions for: dou'ble quat'refoil Pronunciation: [key] — Heraldry. Heraldry. a charge having the form of a foil with eight leaves, used esp. as the cadency mark of a ninth son. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double predestination double-quick Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language