How to clear corrupt definitions for SEP 14.x

Hello all, 

Could someone please let me know if there's an official document from Symantec on how to Clear Corrupt Defintions for SEP 14.x

As usual the pathetic technical support does not know how to and doesn't even have an article for SEP 14.x 

All I get from the tech support is articles for SEP 12.1 and SEP 11.x stating that it should work on SEP 14.x

Thankyou 

Farhan Khan