English Reference
adjective

catastrophic

adj.
US /ˌkætəˈstɹɑfɪk/ UK /kˌætɐstɹˈɒfɪk/ cat·a·stroph·ic

  1. 01 B2 Upper Intermediate

    causing a lot of damage or suffering, often very suddenly.

    involving or causing sudden great damage or suffering; often used in environmental, economic, or personal contexts.

    Simple

    The heavy rains caused a catastrophic flood that destroyed many homes.

    In context

    The sudden collapse of the dam led to catastrophic flooding in the valley, displacing thousands of residents within a matter of hours.

    Usage

    Often used to modify nouns like 'failure', 'loss', or 'consequences'.

    disastrouscalamitousruinous
  2. 02 C1 Advanced Technical Technical

    describing a complete and terrible failure from which it is hard to recover.

    denoting a failure that is total and typically irreversible; frequently applied to mechanical or systemic breakdowns.

    Simple

    The rocket suffered a catastrophic engine failure shortly after it launched.

    In context

    The IT department warned that a catastrophic server failure would result in the permanent loss of all unencrypted customer data.

    Usage

    Common in engineering and computing to describe a system that stops working entirely.

    Teacher's tip

    In technical contexts, this implies the system cannot be repaired or resumed without a total reset.

The last six years have seen several catastrophic fires in the West and Canada, Boudreaux said.

Ars Technica· 16 Aug 2026

Wild tigers have suffered a catastrophic century, with numbers falling from about 100,000 at the beginning of the 20th century to about 5,500 today.

The Guardian· 11 Aug 2026

Learned borrowing from Ancient Greek καταστροφικός (katastrophikós). By surface analysis, catastrophe + -ic.

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

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated