To ransom, liberate, or rescue from captivity or bondage, or from any obligation or liability to suffer or to be forfeited, by paying a price or ransom; to ransom; to rescue; to recover; as, to redeem a captive, a pledge, and the like.
To buy back. Describes what Jesus did for all people by coming to earth, living a perfect live to fulfill God's demands of all people, and dying on the cross for the sins of all people of all time. "You are not your own; you were bought at a price" (1 Corinthians 6:19, 20).