Hey fleecy
I’m not sure if you just want to know what Vma means or if you want to know what it is.
It means Design Maneuvering Speed, and is normally expressed as Va. But here is a link to where you can take your time and bounce back and forth between the definitions to find out what Va really is.
http://a257.g.akamaitech.net/7/257/2...4cfr25.335.pdf