noun /ˈkeɪ.ɒs/
a) The unordered state of matter in classical accounts of cosmogony
What is the centre of the earth? is it pure element only, as Aristotle decrees, inhabited (as Paracelsus thinks) with creatures whose chaos is the earth: or with fairies, as the woods and waters (according to him) are with nymphs, or as the air with spirits?
b) Any state of disorder, any confused or amorphous mixture or conglomeration.
Wikipedia foundation.