World War I Definition
    noun
  
 The war (1914-18) between the Allies (Great Britain, France, Russia, the U.S., Italy, Japan, etc.) and the Central Powers (Germany, Austria-Hungary, etc.)
 Webster's New World 
Synonyms: 
  - War to End War
 - first-world-war
 - World War 1
 - great-war
 
    pronoun
  
 The war from 1914 to 1918 between the Entente Powers of the British Empire, Russian Empire, France, Italy, the United States and other allied nations, against the Central Powers represented by the German Empire, Austria-Hungary, the Ottoman Empire, and Bulgaria.
Wiktionary 





