Question

What is this Regeneration​

Answer 1

Spiritually, it means that God brings Christians to new life or "born again" from a previous state of separation from God and subjection to the decay of death (Ephesians 2:5). ... Furthermore, there is the sense in which regeneration includes the concept "being born again" (John 3:3-8 and 1 Peter 1:3).

Answer 2

Regeneration means that an organism regrows a lost part, so that the original function is restored.