combustion

/kəmˈbʌs.tʃən/
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The burning of a substance through a heat-releasing reaction, especially in fires and engines, with a rarer figurative use for violent social or emotional turmoil.

Examples

  • The lab measured the heat of combustion for several fuels.
  • The novel captures a city in social combustion.
  • Commentators described the protests as social combustion.
  • The empire entered a period of combustion after the succession crisis.
  • Complete combustion of methane produces carbon dioxide and water.

Similar words

flare-up
oxidation
combustion reaction
eruption
ignition
upheaval
turmoil
unrest
tumult
incineration

Meanings

Burning chemical reaction

noun
chemistry
neutral
A reaction in which a fuel or other substance burns with an oxidizer, usually producing heat and often light or flame.

Examples

  • The combustion of gasoline releases heat that drives the engine.
  • Complete combustion of methane produces carbon dioxide and water.
  • Poor ventilation can make combustion incomplete and produce carbon monoxide.
  • The lab measured the heat of combustion for several fuels.
  • A spark can start combustion when fuel vapor mixes with air.
  • Internal combustion engines burn fuel inside the cylinder.

Similar words

Violent unrest or turmoil

noun
social
formal
A state of intense agitation, conflict, or public turmoil that seems to flare up like a fire.

Examples

  • The scandal produced a season of political combustion.
  • The novel captures a city in social combustion.
  • Years of economic strain brought the region to combustion.
  • Commentators described the protests as social combustion.
  • The reform debate exposed the combustion beneath the party's calm surface.
  • The empire entered a period of combustion after the succession crisis.

Similar words

Etymology

From Middle English combustioun, borrowed through Anglo-French and Old French from Late Latin combustio, from Latin comburere, "to burn up or consume."

FAQ

What does combustion mean?

Combustion means the process or act of burning, usually a chemical reaction that releases heat and often light.

Is combustion the same as burning?

Burning is the everyday word, while combustion is the more technical word for the process behind it.

What is needed for combustion?

Most combustion needs fuel, an oxidizer such as oxygen, and enough heat to start the reaction.

What does complete combustion produce?

Complete combustion of a hydrocarbon fuel mainly produces carbon dioxide, water, and heat.

Can combustion happen without a visible flame?

Yes. Some forms, such as smoldering or catalytic combustion, can release heat without a bright flame.

Can combustion be figurative?

Yes. In formal writing, combustion can describe violent social agitation or turmoil.

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