English Proper noun World War I A war which lasted from 1914 to 1918 between the Allied forces of Great Britain, United States, Russia, Italy and other allied nations, against the Axis powers which were defeated, represented by Germany, Autria-Hungary, Turkey, and Bulgaria. Synonyms The Great War Related terms world war World War II World War III Translations Interlingua: Prime Guerra Mundial Spanish: Primera Guerra Mundial Volapük: volakrig balidik