[ 'keɪɒs ]
■ noun
1》 complete disorder and confusion.
↘ Physics the property of a complex system whose behaviour is so unpredictable as to appear random, owing to great sensitivity to small changes in conditions.
2》 the formless matter supposed to have existed before the creation of the universe.
Origin
C15 (denoting a gaping void): via Fr. and L. from Gk khaos 'vast chasm, void'.