What is the definition of a family feud?

It is a TV game show that has been hosted by Richard Dawson and Steve Harvey.

An actual family feud is when some members of the family aren't speaking to others because of some hurt, real or perceived.

It can also involve "blood feuds" between two families like those of Romeo & Juliet or the Hatfields & the McCoys. Family feuds can go on for generations, to the point where some members of the family no longer even know what the fighting is about.