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