Hi,
You can't get the meaning of "Generated" in single word. You need to check with "Approved" status. After approval, document still in draft document status. So the originator need to convert it into normal document.
Approved----Not yet converted in the normal document by the originator
Generated---Approved by authorizer and as well converted into normal document by originator
Hope you understand.
Thanks & Regards,
Nagarajan