- Noun. (initialism of, congenital high airway obstruction syndrome) .
- Noun. (slang) (initialism of, can't have anyone over syndrome) .
- Noun. (obsolete) A vast chasm or abyss.
- Noun. The unordered state of matter in classical accounts of cosmogony.
- Noun. Any state of disorder, any confused or amorphous mixture or conglomeration.
- Noun. (obsolete, rare) A given medium; a space in which something exists or lives; an environment.
- Noun. (mathematics) Behaviour of iterative non-linear systems in which arbitrarily small variations in initial conditions become magnified over time.
- Noun. (fantasy) One of the two metaphysical forces of the world in some fantasy settings, as opposed to law.