<p><strong>Noun</strong></p><ul><li>any of a highly diverse group of religious, philosophical, or countercultural practices centered around Satan, either as a deity or a nontheistic symbol of enlightenment, individualism, or ethical egoism</li><li>a deliberate inversion of Christian rites in which Satan is worshiped</li><li>diabolical or satanic disposition, behavior, or activity</li></ul>