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detonation.

An explosion or sudden report made by the near-instantaneous decomposition or combustion of unstable substances. Specifically, combustion that spreads supersonically via shock compression.

10 characters4 syllables approx.English language

Meaning & usage

noun/dɛtəˈneɪʃən/UK
  1. An explosion or sudden report made by the near-instantaneous decomposition or combustion of unstable substances. Specifically, combustion that spreads supersonically via shock compression.

    countable · uncountable
    the detonation of gun cotton
  2. An explosion or sudden report made by the near-instantaneous decomposition or combustion of unstable substances. Specifically, combustion that spreads supersonically via shock compression. Any sudden explosion made by an exothermic process (whether chemical or not) that produces a supersonic shock wave.

    broadly · countable · uncountable
    a nuclear detonation
    carbon detonation
  3. Engine knocking, a type of improper combustion in gasoline piston engines.

    countable · uncountable
Where this word comes from

From French détonation; equivalent to detonate + -ion.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.