I'm not sure there are dictionary definitions for these MM, just like the whole class differentiation says more about the definer than the definitions, which are at best woolly. I guess I'd consider a high flyer, regularly on business class, with a pied-a-terre in the City and A nice home in surrey and a sports car, rich, even if he's a few missing paychecks away from disaster. Those that will simply never have to give it a thought I'd define as super-rich, but sue me as I'm not sure anyone has the definitive ... er.. definition, gosh that sounds tautological.