Purification and atonement
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Practices reflecting a sense of contamination or guilt; concept of ritual uncleanness; things and persons considered unclean or impure; purification rites (e.g., ritual ablutions and bathing); concepts of sin, salvation, and redemption; riddance of sin (e.g., confession, remission, atonement, penance, scapegoat); etc.
The term was changed from "Purification and Expiation" to "Purification and Atonement" in 2000.