Sumennos...

Catastrophe may mean:

A disaster, sometimes used to mean an unusually severe disaster. (Most common meaning.)
In ancient Greek tragedies, the solution of the plot.
In the field of sociology it is defined as social change of an outstanding radical and rapid character, with highly magical explanations by victims and others.
Related phrases:

As a technical and a computer-related term, "catastrophic failure" usually refers to a failure within a system which leads to failure of the system as a whole.
In mathematics, catastrophe theory studies how the behaviour of dynamical systems can change drastically with variations in certain parameters.

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