(a) old age, the closing years of life; (b) adult or mature age; = full age, n.1

The point in life which typically brings maturity, or which by custom or law is fixed as doing so; adulthood. Frequently in Law. Now usually in of age…

Adulthood, maturity.

Adult or mature age; the age at which a person is considered (esp. for legal purposes) to have the status of an adult; the age of majority. Often…

In relation to physical development, and its associated characteristics. Of a person or human faculty: the state of being physically and mentally…

In plural. The point of life which brings maturity or adulthood. Esp. in into (also of, to,etc.) years. Also in extended use. Obsolete.

an age of discretion, a person's majority; cf. just years n.

years of adulthood; cf. just age n.

spec. The ‘standing still’ of a living being, when it has attained its full growth, and before it begins to decay. Obsolete. Cf. consistent, adj. 2b.

Arrived at maturity; grown-up. See also full-grown, adj. †grown years: mature, ripe years.

(a) the age at which a person's participation in a particular activity or appointment to a specific role is legally valid or permissible (cf. age, n.…

The state, condition, or fact of being adult, or an adult; (possession of) adult qualities, attributes, or characteristics.

The state or condition of being adult, or an adult; maturity, adulthood.

The state of being mutton (as opposed to lamb).

The condition or state of being adult, or an adult.