"All children, except one, grow up."

Thus begins the book Peter Pan, the story of the only boy who never grows up. But for the rest of us, what does that term mean, exactly? At what point have you grown sufficiently "up" to be considered an adult? What does the process entail? Is it a good thing or a bad thing (or both)?

Thank you to Souren Vahdatfarimani and Paul Yachnin for their insightful thoughts on the subject.