The Oxford Dictionary defines **to abdicate** as "fail to fulfill or undertake (a responsibility or duty)", which renders me wondering what does *fulfill a responsibility* mean.

I understand it (abdicate) this way: for instance, you have finished a course "How to repair TV sets" and every time your TV set breaks, you hire somebody else to repair it. In other words, there is a situation when you are supposed to do something, but you don't do it, for some reason -- you abdicate your responsibility.