Ruby on Rails, different?

Question

I know 'Ruby' is also a great OOP language but what makes Ruby different from Ruby on Rails or "What is Ruby-on-Rails?"

Answer 1

https://www.sitepoint.com/community/t/ruby-vs-ruby-on-rails/6057
https://www.quora.com/What-is-the-difference-between-Ruby-and-Ruby-on-Rails-web-framework

Answer 2

ruby on rails is a backend framework for ruby so it is not a language but more an extension for servers for ruby