What is the definition of World War 3?

i come from a background where i've been working on strategic security issues. As for the phrase world war three, which is obviously provocative and hard for people to process,. But yedont the definition of it? Well, it's very broad, covering a lot of geographies. And i argued then that we were going to get more stress between the us in russia and the us. In china, exactly what has happened.