From WordNet (r) 3.0 (2006) [wn]:
maturity
n 1: the period of time in your life after your physical growth
has stopped and you are fully developed [syn: adulthood,
maturity]
2: state of being mature; full development [syn: maturity,
matureness] [ant: immatureness, immaturity]
3: the date on which an obligation must be repaid [syn:
maturity, 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]