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

present participle of age

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 agg

(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.