In a state of complete confusion and disorder. The classroom was chaotic after the teacher left the room.
Lacking a visible order or organization. The chaotic arrangement of the furniture made it difficult to move around the room.
Unpredictable and prone to sudden changes. The weather has been chaotic this week, with sudden storms and clear skies alternating rapidly.
Relating to or characteristic of chaos theory, especially involving sensitive dependence on initial conditions. The physicists built a model to simulate chaotic systems found in nature.