Reincarnation, also known as rebirth, transmigration, or in Ancient Greek-inspired texts metempsychosis, is the philosophical or religious concept that the non-physical essence of a living being begins a new life in a different physical form or body after biological death. In most beliefs involving reincarnation, the soul of a human being is immortal and does not disperse after the physical body has perished. Upon death, the soul merely becomes transmigrated into a newborn baby or an animal to continue its immortality. The term transmigration means the passing of a soul from one body to another after death.