Noun

1. disorder

   1998 R. F. T. Stepto, Rosemarie Szostak - Molecular Sieves: Principles of their formation, structure and properties

   Simplexity, according to Goldsmith, is defined as "synonymous with disorder, or structural simplicity or high entropy.

2. The number of simplexes into which a structure can be divided
3. The tendency of a simple system to generate complex forms
4. The act of establishing a simple interface for something that is complex.