1. the time during which someone's life continues
e.g. the monarch's last days
in his final years
Synonym: days
2. a late time of life
e.g. old age is not for sissies
he's showing his years
age hasn't slowed him down at all
a beard white with eld
on the brink of geezerhood
Synonym: old ageageeldgeezerhood
3. a prolonged period of time
e.g. we've known each other for ages
I haven't been there for years and years