regeneration

noun6

1. •
   Rebuilding or restructuring; large scale repair or renewal; revitalisation.

   • The conversion of so many old industrial buildings into living quarters was a major factor in the regeneration.
2. •
   The renewal of the world at the second coming of Christ.
3. •
   The process by which a water softener flushes out minerals extracted from the water supply.
4. •
   The ability to rapidly heal substantial physical damage to one's body, or to spontaneously restore hit points.

   • The standard ring of regeneration restores one point of damage per turn (and will eventually replace lost limbs or organs). — 1995
5. •
   Spiritual rebirth; the change from a carnal or material life to a pious one
6. •
   The property of a kind of circuit, much used in radio receivers, that allows an electronic signal to be amplified many times through a feedback loop.