Simple Definition of world war
: a war involving many nations of the world
Full Definition of world war
: a war engaged in by all or most of the principal nations of the world; especially capitalized both Ws : either of two such wars of the first half of the 20th century
Examples of world war
He fought in both World Wars.
The nations were prepared for world war.
First Known Use of world war
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Britannica English: Translation of "world war" for Arabic speakers
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