Counter Reformation 16th-century reformation that arose largely in answer to the Protestant Reformation; sometimes called the Catholic Reformation. Although the Roman Catholic reformers shared the Protestants' revulsion at the corrupt conditions in the church, there was present none of the tradition breaking that characterized Protestantism. The Counter Reformation was led by conservative forces whose aim was both to reform the church and to secure the its traditions against the innovations of Protestant theology and against the more liberalizing effects of the Renaissance.