Purification is the process of rendering something pure, i.e. clean of foreign elements and/or pollution, and may refer to:

• List of purification methods in chemistry
• Purification of quantum state in quantum mechanics, especially quantum information
• Purification theorem in game theory and economics, a Nash equilibrium consisting of randomly mixed strategies
• Ritual purification, the religious activity to remove uncleanliness
• Purification of the Virgin, a Christian liturgical feast
• Purification Rundown in Scientology, a procedure that supposedly rids the body of toxins
• Purification, a 2002 Crimson Thorn album

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