The reformation of something is the act or process of changing and improving it.
例句
He devoted his energies to the reformation of science.他致力于科學的革新。
N-PROPER
宗教改革運動（16世紀天主教會的改革運動）
The Reformation is the movement to reform the Catholic Church in the sixteenth century, which led to the Protestant church being set up.
例句
...a famous statue of the Virgin which was destroyed during the Reformation.在宗教改革運動中被毀的著名的圣母馬利亞塑像
英英詞典釋義
Noun
1. improvement (or an intended improvement) in the existing form or condition of institutions or practices etc.; intended to make a striking change for the better in social or political or religious affairs
2. rescuing from error and returning to a rightful course;