say it: KAY-ahs
chaos is a noun meaning "a state of extreme confusion and disorder". It carries 4 recorded senses.
a state of extreme confusion and disorder
the formless and disordered state of matter before the creation of the cosmos
(Greek mythology) the most ancient of gods; the personification of the infinity of space preceding creation of the universe
Greek mythology
(physics) a dynamical system that is extremely sensitive to its initial conditions
physics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for chaos come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.