A disaster beyond expectations.
Any large and disastrous event of great significance.
The dramatic event that initiates the resolution of the plot; the dénouement.
A type of bifurcation, where a system shifts between two stable states.
A disaster, especially one which is large in scale and readily seen by public observers.
The aftermath of a train crash.
Someone (especially a woman) who is unbalanced and considered a mess, a disaster, one who is suffering personal ruin.
To ruin utterly and catastrophically, to cause to end in disaster.