The process of becoming older or more mature. / The deliberate process of making something (such as an antique) appear (or, in science fiction, become) older than it is.

Becoming elderly.

present participle of agg

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.

(formal, idiomatic) For all time, forever.

Used other than figuratively or idiomatically: The least age at which one is permitted by law to drink alcoholic beverages. / (poker slang) A two and an ace as a starting hand in Texas hold 'em

plural of age of majority

(see usage notes) The period of European history encompassing (roughly) 476–1000 CE. / (Ancient Greece) The Greek Dark Ages (c. 1100–750 BCE). / The dark ages of Cambodia (c. 1450–1863).

plural of age group

A therapy or process which reverses the physiological aging process.