Confused; thrown together into a vast heap without any order or arrangement.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
In wild confusion; disordered; as, chaotic ideas.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Like chaos: confused or disordered.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Resembling chaos; confused.
- Newage Dictionary DB (adjective) (adj.) (adjective)

Usage examples:

It would soon cease to be a system, and would become chaotic
- Rural Life and the Rural School by Joseph Kennedy
It was still in a rather chaotic condition, he reported, but the " stuff" was there, and he anticipated a busy winter.
- Sisters by Kathleen Norris
His chaotic brain is aware only of its mad purpose.
- In the Brooding Wild by Ridgwell Cullum