/ Dictionary / Index S Second World: Meaning and Definition of Find definitions for: Sec'ond World' Pronunciation: [key] — (sometimes l.c.) the world's industrialized nations other than the U.S. and the U.S.S.R. the Communist and socialist nations of the world. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. second wind Second World War 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