"Sola," from the Latin adjective "solus, -a, -um;" meaning "alone, only, single, sole." Thus "sola Scriptura" means "by Scripture alone." This would imply that there is no other authority but Scripture. What do you mean by the term?
The phrase sola scriptura is from the Latin: sola having the idea of “alone,” “ground,” “base,” and the word scriptura meaning “writings”—referring to the Scriptures. Sola scriptura means that Scripture alone is authoritative for the faith and practice of the Christian. The Bible is complete, authoritative, and true.
https://www.gotquestions.org/sola-scriptura.html
More at the link above.
In the Scriptures we have what is needed to have a saving faith in Christ and how to develop that relationship with Him.
Sola Scriptura explanation
https://www.ligonier.org/blog/what-does-sola-scriptura-mean/
The Reformation principle of sola Scriptura has to do with the sufficiency of Scripture as our supreme authority in all spiritual matters. Sola Scriptura simply means that all truth necessary for our salvation and spiritual life is taught either explicitly or implicitly in Scripture. It is not a claim that all truth of every kind is found in Scripture. The most ardent defender of sola Scriptura will concede, for example, that Scripture has little or nothing to say about DNA structures, microbiology, the rules of Chinese grammar, or rocket science. This or that “scientific truth,” for example, may or may not be actually true, whether or not it can be supported by Scripture—but Scripture is a “more sure Word,” standing above all other truth in its authority and certainty. It is “more sure,” according to the apostle Peter, than the data we gather firsthand through our senses (2 Peter 1:19). Therefore, Scripture is the highest and supreme authority on any matter on which it speaks.
But there are many important questions on which Scripture is silent. Sola Scriptura makes no claim to the contrary. Nor does sola Scriptura claim that everything Jesus or the apostles ever taught is preserved in Scripture. It only means that everything necessary, everything binding on our consciences, and everything God requires of us is given to us in Scripture (2 Peter 1:3).
Furthermore, we are forbidden to add to or take away from Scripture (cf. Deut. 4:2; 12:32; Rev. 22:18-19). To add to it is to lay on people a burden that God Himself does not intend for them to bear (cf. Matt. 23:4).
Scripture is therefore the perfect and only standard of spiritual truth, revealing infallibly all that we must believe in order to be saved and all that we must do in order to glorify God. That—no more, no less—is what sola Scriptura means.
Here is a good definition of what is meant by Sola Scriptura.
http://www.freerepublic.com/focus/religion/3059418/posts?page=828#828
“First of all, it is not a claim that the Bible contains all knowledge. The Bible is not exhaustive in every detail. John 21:25 speaks to the fact that there are many things that Jesus said and did that are not recorded in John, or in fact in any book in the world because the whole books of the world could not contain it. But the Bible does not have to be exhaustive to function as the sole rule of faith for the Church. We do not need to know the color of Thomas’ eyes. We do not need to know the menu of each meal of the Apostolic band for the Scriptures to function as the sole rule of faith for the Church.
Secondly, it is not a denial of the Church’s authority to teach God’s truth. I Timothy 3:15 describes the Church as “the pillar and foundation of the truth.” The truth is in Jesus Christ and in His Word. The Church teaches truth and calls men to Christ and, in so doing, functions as the pillar and foundation thereof. The Church does not add revelation or rule over Scripture. The Church being the bride of Christ, listens to the Word of Christ, which is found in God-breathed Scripture.
Thirdly, it is not a denial that God’s Word has been spoken. Apostolic preaching was authoritative in and of itself. Yet, the Apostles proved their message from Scripture, as we see in Acts 17:2, and 18:28, and John commended those in Ephesus for testing those who claimed to be Apostles, Revelation 2:2. The Apostles were not afraid to demonstrate the consistency between their teaching and the Old Testament.
And, finally, sola scriptura is not a denial of the role of the Holy Spirit in guiding and enlightening the Church.
What then is sola scriptura?
The doctrine of sola scriptura, simply stated, is 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 at the Scriptures as the only and sufficient rule of faith and the Church is always subject to the Word, and is constantly reformed thereby.