mature

Fully developed; grown up in terms of physical appearance, behaviour or thinking; ripe.

"She is quite mature for her age."

Brought to a state of complete readiness.

"a mature plan"

Profound; careful.

"The headmaster decided to expel the boy after a mature consideration."

Come to, or in a state of, completed suppuration.

Suitable for adults only, due to sexual themes, violence, etc.

"mature content"

To proceed toward maturity: full development or completion (either of concrete or of abstract things, e.g. plans, judgments, qualities).

To attain maturity, to become mature or ripe.

To bring (something) to maturity, full development, or completion.

To make (something, e.g. fruit) ripe or mature.

To proceed toward or become mature or full-grown, either physically or psychologically; to gain experience or wisdom with age.

To make (someone) mature.

To reach the date when payment is due.

"When the bond matures, the full face value is payable to its bearer."