(intransitive) To grow aged; to become old; to show marks of age. / (intransitive, informal, of a statement, prediction) To be viewed or turn out in some way after a certain time has passed.

(countable) The whole duration of a being, whether human, animal, plant, or other kind, being alive.

plural of ageing

Old. / (chiefly non-US) Having the age of. / Having undergone the improving effects of time; matured.

Old people, collectively.

simple past tense and past participle of age

forming nouns with the sense of collection or appurtenance. / forming nouns indicating a process, action, or a result / forming nouns of a state or relationship / forming nouns indicating a place

UK, Australia, and New Zealand standard spelling of aging.

Old enough to be considered an adult (in law, or by society generally). / (formal, idiomatic, law, usually literary) Having existed for a certain period of time; used in referring to a person's age.

present participle of age