ˌold ˈage BrE AmE noun [uncountable]
the part of your life when you are old ⇨ middle age :
You need to start putting money away for your old age.
in (sb’s) old age
My mother had a very lively mind, even in her old age.
OLD AGE
Meaning of OLD AGE in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012