世界大戦 (sekaitaisen) Japanese meaning: world war | KotomoraWorld War I began in 1914.
It is important to learn the history of world wars.
Usage patterns
第〈数〉次世界大戦the Nth World War (e.g. First, Second)
World War II ended in 1945.
世界大戦が起こるfor a world war to break out
世界大戦に参加するto take part in a world war
That country took part in World War I.
If it turned into a nuclear war, a new world war might break out.