Difference between Web Application Framework and a Content Management System?

Question

Are both completely different concepts? Or is there an overlap in their meaning?

Would it be correct to say that a Web Framework is used for the creation of a front-

Answer 1

Drupal runs on php and Ruby on rails runs on, well, Ruby, so they wouldn't play together.

Just to muddy the waters a bit, Drupal describes itself as a content managment framework which is essentially a content management system with hooks to extend it. Which does create an overlap. The drupal overview describes this better than I could.