ageing
age-ing
verb
The act of becoming or making something older.
"The whisky is ageing in oak barrels."
adjective
Becoming older or showing the effects of time.
"An ageing population needs more social care."
noun
The natural process of growing older or maturing.
"Research focuses on the science of human ageing."
Thesaurus
Synonyms: old, senescent, aging, ripening, senescence