/ Dictionary / Index F First World: Meaning and Definition of Find definitions for: First' World' Pronunciation: [key] the major industrialized non-Communist nations, including those in Western Europe, the United States, Canada, and Japan. Cf. Second World, Third World, Fourth World. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. first water First World War Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language