The stage of life corresponding to old age; the period when a person is elderly (often used in medical and social care contexts).
老年期には筋力低下や認知機能の変化に注意が必要だ。
In old age, it's important to pay attention to muscle weakness and changes in cognitive function.
家族は父の老年期の生活を支えるために介護サービスを利用した。
The family used care services to support their father's life during his old age.
老年期に入ると、予防医療や定期検診がより重要になる。
Upon entering old age, preventive medicine and regular checkups become more important.