/ Dictionary / Index W World War II: Meaning and Definition of Find definitions for: World War II Pronunciation: [key] the war between the Axis and the Allies, beginning on September 1, 1939, with the German invasion of Poland and ending with the surrender of Germany on May 8, 1945, and of Japan on August 14, 1945. Abbr.: WWII Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. World War I World War III Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language