chaos

1. A condition or place of great disorder or confusion.
2. A disorderly mass; a jumble: The desk was a chaos of papers and unopened letters.
3. often Chaos The disordered state of unformed matter and infinite space supposed in some cosmogonic views to have existed before the ordered universe.
4. Mathematics. A dynamical system that has a sensitive dependence on its initial conditions.
5. Obsolete. An abyss; a chasm.

[Middle English, formless primordial space, from Latin, from Greek khaos.]