world war, n.
A war involving many nations of the world; spec. that of 1914–18 or of 1939–45.First, Second, Third World War: see the first element.
1848—2003(Hide quotations)
Phrases
World War I n. (also World War One, World War No.1) = First World War n. at first adj., adv., and n.2 Compounds 1b(b). Abbreviated WWI.
1939—2004(Hide quotations)
World War II n. (also World War Two; occasionally World War No. 2, World War Deuce) = Second World War n. at second adj. and n.2 Compounds 1; (also more generally) the second in a series of world wars (rare). Abbreviated WWII.In quot. 1919 with reference to an imagined future war arising out of the social upheaval consequent upon the First World War (1914–18).
1919—2007(Hide quotations)
World War III n. (also World War Three, World War No. 3) = Third World War n. at third adj. and n. Compounds 2.
1945—2003(Hide quotations)