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
  • Water purification
    • Organisms used in water purification
  • 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
  • Sweat lodge