Theology definition of “Salvation”: Deliverance from sin and its consequences, believed by Christians to be brought about by faith in Christ.
In Christianity, salvation (also called deliverance or redemption) is the “saving [of] human beings from sin and its consequences, which include death and separation from God” by Christ’s death and resurrection, and the justification following this salvation.
It is not from yourself or anything you’ve done, but the gift of God.” Salvation, therefore, is a free gift of grace from God. When a person accepts the gift of salvation, he or she is said to be justified — made acceptable before (or made right with) God.
The gift of salvation is the gift of sanctification, by word and Spirit. The light that God graciously gives is the revelation of Himself.
Salvation is made possible by the life, death, and resurrection of Jesus, which in the context of salvation is referred to as the “atonement”. John 3:16