The Latin "Sola Scriptura" means "Scripture Only," or "Scripture alone." This was one of the distinctive features of the Protestant Reformation and signaled the Reformed departure from alleged Papal infallibility and the authority of Romish tradition. The Reformers claimed the principle of Sola Scriptura or the all-sufficiency of Scripture was the only rule of both faith and practice.
the doctrine of Sola Scriptura simply states that the Scriptures and the Scriptures alone are sufficient to function as the regula fide, the rule of faith, for the Church. All that one must believe to be a Christian is found in Scripture and in no other source. That which is not found in Scripture is not binding upon the Christian conscience. To be more specific, I provide the following definition. The Bible claims to be the sole and sufficient rule of faith for the Christian Church. The Scriptures are not in need of any supplement. Their authority comes from their nature as God-breathed revelation. Their authority is not dependent upon man, church or council. The Scriptures are self-consistent, self-interpreting and self-authenticating. The Christian Church looks to the Scriptures as the only and sufficient rule of faith and the Church is always subject to the Word and is constantly reformed thereby." - James White
We reaffirm the inerrant Scripture to be the sole source of written divine revelation, which alone can bind the conscience. The Bible alone teaches all that is necessary for our salvation from sin and is the standard by which all Christian behavior must be measured.
We deny that any creed, council or individual may bind a Christian's conscience, that the Holy Spirit speaks independently of or contrary to what is set forth in the Bible, or that personal spiritual experience can ever be a vehicle of revelation. - Cambridge Declaration