The therapeutic community uses the term 'maturity' a lot. It is a word that implies a healthy psyche relatively free of mental disturbances. In this sense it is the holy grail of psychology.

It is also a word that is mis-used. In some people's mouths it is mainly self-serving and can mean little more than a demand for conformity either of themselves or others.

As I see it the word has many connotations. In its truest form it is about responsibility, being broad-shouldered enough to carry ones own weight appropriately. I would say it obtains in having perspective, in having an overview which allows a coming out of narrow self interests to a greater understanding of the broader context. Above all, it should result in the knowledge that one's own interests and those of others are bound together.