"Reformed" refers to a branch of Protestant Christianity that emerged from the teachings of the Reformation in the 16th century. It emphasizes the sovereignty of God, the authority of Scripture, and the necessity of grace through faith. Key figures include John Calvin and Huldrych Zwingli, who shaped its doctrines and practices. The Reformed tradition is characterized by its distinct beliefs about salvation, predestination, and the sacraments. It often includes various denominations, such as the Presbyterian and Reformed Church in America, which uphold these theological principles while engaging in worship and community life.