a state of extreme confusion and disorder
"The sudden power outage plunged the busy office into chaos as everyone scrambled to save their work."
the formless and disordered state of matter before the creation of the cosmos
"According to ancient cosmology, the universe emerged from a primordial chaos where matter existed in a formless and disordered state before creation."
(Greek mythology) the most ancient of gods; the personification of the infinity of space preceding creation of the universe
"In Greek mythology, Chaos was the primordial god who existed before any other deity or matter came into being."
(physics) a dynamical system that is extremely sensitive to its initial conditions
"The weather forecast failed because the atmosphere acts as a chaotic system where tiny changes in temperature drastically alter future outcomes."
The unordered state of matter in classical accounts of cosmogony.
"The patient was diagnosed with CHAOS, a rare condition causing severe breathing difficulties at birth."
Initialism of congenital high airway obstruction syndrome.
In plain English: Chaos is total disorder where everything happens randomly and without any plan.
"The loud music and dancing turned the quiet living room into total chaos."
Usage: Use chaos to describe any situation that is completely disordered or unpredictable, rather than the specific scientific theory regarding the early universe. This word often confuses people who expect a more positive meaning like "freedom," but it strictly implies confusion and lack of structure in everyday contexts.
The word chaos comes from Ancient Greek, where it originally meant a vast chasm or void. By the 16th century, it began to refer to primordial matter, while its modern sense of confusion and disorder emerged in the 17th century.