noun
Formal, somewhat literary term used in congratulatory contexts, such as celebrating someone's longevity or referring to a venerable age. Not an everyday word for 'age' or 'life'.
祖父の寿齢を祝う会を開いた。
We held a party to celebrate my grandfather's long life.
寿齢を重ねられた方々の話は貴重だ。
The stories of those who have reached an advanced age are precious.