Definition-A sum of money or other payment demanded or paid for the release of a prisoner.
You know, man was held prisoner, once Adam had disobeyed God. He and his wife’s lives were turned upside down and inside out. Their captor and now, “the god of this world,” or Satan as he is called, required a life for a life. God was grieved of course and didn’t want his man to be utterly destroyed. So He set up a sacrificial system. This system would require the life of an innocent animal in the place of His man. This is why God required sacrifice, not because he was a violent God, but to save his man alive. Many things had transpired, and the there was one last sacrificial payment made for the life of his man. His son Jesus. Jesus paid the ransom in full!
You don’t have to suffer under the penalty of that original sin, except Jesus as Savior, then make Him Lord by your obedient walk on His word.
Mark 10:45 For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many