spontaneous combustion

noun

: self-ignition of combustible material through chemical action (such as oxidation) of its constituents

called also spontaneous ignition

Examples of spontaneous combustion in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Almost a Tesla, less risk of spontaneous combustion. — Pat Beall, Sun Sentinel, 20 Feb. 2026 The fire ignited by spontaneous combustion. — Logan Smith, CBS News, 11 Apr. 2026 Indeed, the Democratic Party has become a ramshackle, disheveled party and has given a new meaning to spontaneous combustion. — Letters To The Editor, The Orlando Sentinel, 10 May 2025 Geologists say shifting earth layers in this area exposes rock components to oxygen, which can react and create extreme heat, triggering spontaneous combustion. — Grace Toohey, Los Angeles Times, 24 Apr. 2026 See All Example Sentences for spontaneous combustion

Word History

First Known Use

1795, in the meaning defined above

Time Traveler
The first known use of spontaneous combustion was in 1795

Rhymes for spontaneous combustion

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Browse Nearby Words

spontaneous amputation
spontaneous combustion
spontaneous generation
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Cite this Entry

“Spontaneous combustion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spontaneous%20combustion. Accessed 7 Jul. 2026.

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Kids Definition

spontaneous combustion

noun
: a bursting of material into flame from the heat produced within itself by chemical action (as oxidation)

More from Merriam-Webster on spontaneous combustion

Britannica.com: Encyclopedia article about spontaneous combustion

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