What Does GA (General Availability) Mean?

I have a question I wanted to throw out. The term “GA” gets batted around all the time as meaning, the production-ready version of MySQL server. However, googling for quite a bit, I can’t find a definition for GA (other than what I stated above, i.e. production-ready). What does this mean in terms of bugs? Features? Anything else I might be missing?

I believe it means that there are no known “critical” (whatever that means) bugs and there will definitely be no more features added. Can anyone point me to a good definition?