/ Dictionary / Index F Four Hundred: Meaning and Definition of Find definitions for: Four' Hun'dred Pronunciation: [key] the exclusive social set of a city or area. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Four Horsemen of the Apocalypse four-hundred-day clock Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language