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Wiktionary
reincarnationism

n. The belief that beings are reincarnated in a new form after death.

WordNet
reincarnationism

n. a doctrine that on the death of the body the soul migrates to or is born again in another body

Wikipedia
Reincarnationism

Reincarnationism or biblical reincarnation is the belief that certain people are or can be reincarnations of biblical figures, such as Jesus Christ and the Virgin Mary.