A state of big, utter confusion
Merriam-Webster Online Dictionary
chaos (noun)1.
obsolete - chasm abyss
2.
a) often capitalized a state of things in which chance is supreme , especially the confused unorganized state of primordial matter before the creation of distinct forms - compare cosmos
b) the inherent unpredictability in the behavior of a complex natural system (as the atmosphere, boiling water, or the beating heart)
3.
a) a state of utter confusion - the blackout caused chaos throughout the city
b) a confused mass or mixture - a chaos of television antennas