Yes those were the original definitions but colloquial usage has shifted from the original meaning. Although these days the preferred terminology is developed/developing/under developed.

I agree with you and you are correct but this is linguistic prescriptivism, which is one of the things the what is a woman crowd cling to

but the other people using third wold country to mean allows sex abuse makes my skin crawl

Examine your preconceived ideas, before they examine you

I mean it in the colloquial sense based on how well taken care of the people are. No I am not writing a dissertation. This is a discussion on a message board where people may use hyperbole to make their opinion clear