1. Noun

   1.

   (compulsory) retirement age; age limit

2. Noun, Suru verb, Intransitive verb

   2.

   (compulsory) retirement (on reaching retirement age); mandatory retirement

3. Noun

   3.

   minimum years of service at a particular rank before eligibility for promotion (in the Imperial Japanese Army and Navy)

Example sentences

• 定年って、何歳？

  What is age of retirement?

• トムは６５で定年しました。

  Tom retired at 65.