noun

• Rebuilding or restructuring; large scale repair or renewal; revitalisation.
• (theology) Spiritual rebirth; the change from a carnal or material life to a pious one
• (Christianity) The renewal of the world at the second coming of Christ.
• The process by which a water softener flushes out minerals extracted from the water supply.
• (roleplaying games, fantasy) The ability to rapidly heal substantial physical damage to one's body, or to spontaneously restore hit points.