Maturity is a
psychological term used to indicate that a person responds to the circumstances or environment in an appropriate manner; often this implies a response that is reasoned or learned rather than impulsive. Maturity and silliness need not be mutually exclusive, as it often requires the wisdom and learning of many years to gain the distance and confidence required to laugh at oneself, as well as learning that life is just not that much fun without that ability. A measure of maturity is expected as a person grows older.
See also
★
Adult