English Reference

Word

catastrophe

Phoneticscatas·tro·phe

US/kəˈtæstɹəfi/

UK/kɐtˈæstɹəfi/

Definitions

01a disaster

B2

n. a sudden event that causes great trouble, damage, or suffering.

n. a sudden and widespread disaster or misfortune of great significance.

“The earthquake was a total catastrophe for the small mountain village.”

“The sudden collapse of the national bank proved to be a financial catastrophe that wiped out the savings of thousands of families.”

Antonyms

02a failure

B2

n. a complete failure or a very bad situation.

n. a total failure or a situation that has gone completely wrong, often used with slight hyperbole.

“The dinner party was a catastrophe because the oven stopped working.”

“The opening night of the play was a catastrophe, as several actors forgot their lines and the scenery fell over.”

Informal

Antonyms

03the end of a story

C2 · Theatre

n. the final part of a play or story where everything is resolved, often sadly.

n. the final event or denouement of a dramatic work, particularly in classical tragedy, which completes the unfolding of the plot.

“In the final act, the hero's secret is revealed, leading to the catastrophe.”

“The playwright carefully constructed the rising action to ensure that the eventual catastrophe felt both inevitable and emotionally devastating.”

Academic · Formal

Synonyms

denouementconclusion

04a sudden change in a system

C2 · Math

n. a sudden change where a system moves from one state to another.

n. a sudden shift in the behaviour of a system resulting from small changes in its circumstances.

“The bridge collapsed because of a mathematical catastrophe in the structure.”

“Catastrophe theory provides a framework for modelling how continuous changes in input parameters can lead to abrupt, discontinuous changes in a system's state.”

Technical

Usage

Often used in the context of 'catastrophe theory'.

Synonyms

Antonyms

Real-World Examples

“This was the kind of catastrophe his parents, both Auschwitz survivors, had always warned him about, when world history and personal history collide.”
The Guardian · 15 Aug 2026
“If you can help a firefighter to save 15 minutes, it's the difference between a catastrophe and a fire which can be limited to two or three hectares," Chaudier says.”
BBC News · 4 Aug 2026

Etymology

From Ancient Greek καταστροφή (katastrophḗ), from καταστρέφω (katastréphō, “I overturn”), from κατά (katá, “down, against”) + στρέφω (stréphō, “I turn”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domain

Mathematics

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

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English Reference