n.

1. 改革，革新[U][C]
   a radical reformation of society

   社会的根本改革

2. 改过自新[U][C]
3. （大写）（十六世纪欧洲的）宗教改革运动[the S]

n.

1. the action or process of reforming.
2. (the Reformation) a 16th-century movement for the reform of abuses in the Roman Church, ending in the establishment of the Reformed and Protestant Churches.