n.

1. （尤指二十五周年、五十周年等的）纪念（或庆典）[C]
   a silver jubilee

   二十五周年纪念

2. 欢庆，狂欢；喜庆时节[U][C]
   a day of jubilee

   喜庆日

3. （犹太教的）五十年节[C]
4. （天主教的）大赦年[C]
   An ordinary jubilee occurs every twenty-five years.

   普通大赦年每二十五年轮到一次。

n.

1. a special anniversary, especially one celebrating twenty-five or fifty years of something.
2. Jewish History  a year of emancipation and restoration, kept every fifty years.
3. a period of remission from the penal consequences of sin, granted by the Roman Catholic Church under certain conditions for a year, at intervals of twenty-five years.