(British English) (also aging especially in North American English) [uncountable] the process of growing old.

(especially North American English) (British English usually ageing) [uncountable] the process of growing old.

There are five meanings listed in OED's entry for the noun ageing. See 'Meaning & use' for definitions, usage, and quotation evidence. ageing has developed ...

[usually before noun] becoming older and usually less useful, safe, healthy, etc. aging equipment an aging rock star He takes care of his aging mother.

[uncountable] the process of growing old signs of aging skin care products which claim to halt the aging process.

6 дней назад · AGEING definition: 1. relating to getting older: 2. used to describe a person or thing that is getting old: 3. UK…. Learn more.

Given that the Concise Oxford Dictionary gives credence to both spellings, I wished to establish if a consensus existed within the medical literature. A Medline ...

6 дней назад · AGING definition: 1. US spelling of ageing 2. relating to getting older: 3. used to describe a person or thing that…. Learn more. Ageing · AGING | definition in the... · Aging out · Aging schedule

The answer is that both are correct! Ageing is the form that is more commonly found, although aging is occasionally used. The norm, of course, ...