Noun
(compulsory) retirement age; age limit
私の会社では60歳が定年である。At our company, the retirement age is 60. Noun, Suru verb, Intransitive verb
(compulsory) retirement (on reaching retirement age); mandatory retirement
see 定年退職
Noun
minimum years of service at a particular rank before eligibility for promotion (in the Imperial Japanese Army and Navy)
Historical term
Also written 停年【ていねん】