mature

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

She is quite mature for her age.

The excellent mature eggplants grown in the garden plot are quickly being picked up by family and friends.

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).

[…] his originality, in the mean time, was maturing to perfection.

To attain maturity, to become mature or ripe.

[…] Trees […] have alwayes Fruit upon them, ripe, or preparing to mature;

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

[…] But these thoughts Full Counsel must mature:

[…] much it now Imports they should be still deceiv’d, till time Matures our enterprize;

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

[…] a ship well freighted with the stores The sun matures on India’s spicy shores,

There are certain vegetables like the tomato which require a long period to mature the fruit, and these must be started several weeks before the frosts have passed.

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