Denshi Jisho — Online Japanese dictionary

定年 ていねん 1: retirement age;
2: (Archaism) years of service in a military rank before eligibility for promotion
Common word, Noun 
定年 ていねんせい mandatory retirement system; age-limit retirement system
Noun 
定年制度 ていねんせいど mandatory retirement age (system)
Noun 
定年離婚 ていねんりこん divorce of a couple who have been married for a long time (brought on by retirement of the husband)
Noun, Colloquialism 
定年退職 ていねんたいしょく (compulsory) retirement (e.g. on reaching the age of 60); mandatory retirement; reaching retirement age
Noun 
定年退職通知書 ていねんたいしょくつうちしょ notification for compulsory retirement
Noun 

You can also

Look up kanji details for 定年.

Try a Yahoo Jisho search for 定年 .
Try a Goo Jisho search for 定年 .
Try a Google search for 定年 .