What is the meaning of Catastrophe?

Any large and disastrous event of great significance.

A disaster beyond expectations.

The dramatic event that initiates the resolution of the plot; the dénouement.

A type of bifurcation, where a system shifts between two stable states.

superseded spelling of catastrofe

catastrophe

inflection of catastropher:

1. first/third-person singular present indicative/subjunctive
2. second-person singular imperative

first/third-person singular present indicative/subjunctive

second-person singular imperative

Source: wiktionary.org