Maturity (noun)

1. The state of being fully grown or developed.
2. The state of being mature or fully developed.
3. The time when something becomes due for payment or redemption (as of a bond).
4. The quality of being able to think and behave in a responsible and self-controlled way.

Origin:

Middle english, from old french maturité, from latin maturitat-, maturitas, from maturus ripe, mature.

Examples:

1. He attained maturity at an early age.
2. The plant reached maturity and produced seeds.
3. The maturity date of the bond is next month.
4. The maturity of the company's management team was evident in their handling of the crisis.
5. His maturity and self-control impressed his peers and elders.