Ripe or mature before the proper or natural time; early or prematurely ripe or developed; as, precocious trees.
Developed more than is natural or usual at a given age; exceeding what is to be expected of one's years; too forward; -- used especially of mental forwardness; as, a precocious child; precocious talents.
What might be taken for a precocious genius is the genius of childhood. When the child grows up, it disappears without a trace. It may happen that this boy will become a real painter some day, or even a great painter. But then he will have to begin everything again, from zero. Pablo Picasso
As a precocious teen I dreamed of being Graham Greene. Well, as it turned out, I never wrote a great novel, sadly, and I never converted to Catholicism, happily, but I did do one thing he did. That is, in middle age I moved to a seaside town and got into a right barney with the local powers-that-be. Julie Burchill
In writing lyrics - well, for me, anyway - it's about getting into character, you know? 'Who is writing this?' In the case of the original 'Thick As A Brick,' supposedly a precocious, very young child who's fantasizing about his future and the context of all the confusing elements to which school boys are subjected at that time. Ian Anderson