/ Dictionary / Index F fool's gold: Meaning and Definition of Find definitions for: fool's' gold' Pronunciation: [key] iron or copper pyrites, sometimes mistaken for gold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fool's errand fool's paradise Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language