The old definition I learned is that it is a version that you think could be released, unless any major bugs appear that you don't know about yet. It's not some

The old definition I learned is that it is a version that you think could be released, unless any major bugs appear that you don't know about yet. It's not something where you would expect major API changes. But those definitions have become much more fluid, and it's hard to find out which definitions everyone is using.