Definition of "Satanism"

Worship or reverence to Satan (usually synonymous with "the Devil").  examples

A profession, philosophy, or ideological construct featuring a positive, admirable, or useful association to the figure, character or entity known as 'Satan'; or, featuring opposition to all morality and the procurement of what is wanted regardless of the consequences concerning others.  examples

LaVeyan Satanism.  examples

A devilish disposition.  examples