World War One
noun/ˌwɜːld ˌwɔː ˈwʌn/
/ˌwɜːrld ˌwɔːr ˈwʌn/
(also World War I)
(also the First World War)
[singular]- the war that was fought mainly in Europe between 1914 and 1918
Check pronunciation:
World War One