From WordNet (r) 2.0 (August 2003) [wn]:
maturity
n 1: the period of time in your life after your physical growth
has stopped and you are fully developed [syn:
adulthood]
2: state of being mature; full development [syn: matureness]
[ant: immaturity]
3: the date on which a financial obligation must be repaid
[syn: maturity date, due date]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Maturity \Ma*tu"ri*ty\, n. [L. maturitas: cf. F. maturit['e].]
[1913 Webster]
1. The state or quality of being mature; ripeness; full
development; as, the maturity of corn or of grass;
maturity of judgment; the maturity of a plan.
[1913 Webster]
2. Arrival of the time fixed for payment; a becoming due;
termination of the period a note, etc., has to run.
[1913 Webster]