A world war is an armed conflict involving many nations.

World war may also refer to:

World War I (1914–18) World War II (1939–45) World War III, a discussed future possible conflict World War IV, a discussed future possible conflict

Arts and entertainment "World War" (The Cure song) The World Wars (miniseries), a History Channel series Worldwar, a series of novels by Harry Turtledove

See also

War of the World by Niall Ferguson The War of the Worlds (disambiguation) World at War (disambiguation) War World (disambiguation)