WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
deliberately deviating from what is good
noun.
deliberate and stubborn unruliness and resistance to guidance or discipline
Word Usage
"The ultimate end of the relentless pursuit of perversity is probably something like the world of Charles Stross's Glasshouse, a novel depicting a post-singularity society that must be one of the most miserable and monotonous places I have ever read about."