Years ago, my good friend, Terry, told me that his definition of maturity is knowing what you won't do. I think that's a pretty good (and simple, easy to apply) definition.
It focuses, though, on the end result, not on the process that gets one there. Maturing and maturity are clearly related, but their definitions don't necessarily line up quite so easily.
All of us have different roles we play.
Perhaps they can be described simply: I'm a son, a brother, and a father. There may be more to it - we may seem (even to ourselves) to be a different person in each of several different arenas, such as work, home, school, various social settings, etc.
At any rate, I think real maturity and maturing consist of:
- realising that these different roles or personae exist,
- noting that there are parts of each that differ significantly to the others,
- seeing that there are good and bad aspects to each of the personae, and
- moving to integrate the best parts of each mode of behaviour into a single persona.