explosion

American  

[ik-sploh-zhuhn] / ɪkˈsploʊ ʒən /

noun

explosions plural

1. an act or instance of exploding; a violent expansion or bursting with noise, as of gunpowder or a boiler (opposed to implosion).

2. the noise itself.

   The loud explosion woke them.

3. a violent outburst, as of laughter or anger.

4. a sudden, rapid, or great increase.

   a population explosion.

5. the burning of the mixture of fuel and air in an internal-combustion engine.

6. Phonetics. plosion.

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explosion British  

/ ɪkˈspləʊʒən /

noun

1. the act or an instance of exploding

2. a violent release of energy resulting from a rapid chemical or nuclear reaction, esp one that produces a shock wave, loud noise, heat, and light Compare implosion

3. a sudden or violent outburst of activity, noise, emotion, etc

4. a rapid increase, esp in a population

5. phonetics another word for plosion

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explosion Scientific  

/ ĭk-splō′zhən /

1. A violent blowing apart or bursting caused by energy released from a very fast chemical reaction, a nuclear reaction, or the escape of gases under pressure.

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Other Word Forms

Derived Forms

• preexplosion
  noun
• postexplosion
  adjective

Inflected Forms

Nouns

• explosions
  plural

Etymology

Origin of explosion

First recorded in 1615–25; from Latin explōsiōn-, stem of explōsiō, from explōs(us) “driven off by clapping” (past participle of explōdere “to drive off by clapping, drive away”; see explode) + -iō -ion

Explanation

Whether it's a bursting balloon or a detonating bomb, you're sure to notice an explosion. An explosion involves a sudden and often violent burst of energy. The noun explosion is useful when you're talking about a watermelon smashing on the pavement or the burst of fireworks overhead, but it can also describe a sudden increase in something, like an explosion of excitement at a birthday party when the pony arrives. Originally, explosion was used to mean "scornful rejection," from its root in the Latin explodere, "hiss off the stage," and a disappointed audience today might still be described as "exploding with boos."

Example Sentences

It shows that important elements of their body plan were already established shortly after the Cambrian Explosion, a time when life was rapidly diversifying.

From Science Daily • Apr. 3, 2026

But our city can also glean lessons from the Halifax Explosion — especially about the dangers of scapegoating in a time of crisis.

From Los Angeles Times • Jan. 17, 2025

During the Cambrian Explosion more than 500 million years ago, these weird worms — which lived inside long, cone-shaped tubes — were some of the most common predators on the seafloor.

From New York Times • Mar. 26, 2024

To be honest, one of the local papers was calling it "Explosion or implosion?" tonight.

From BBC • Mar. 4, 2024

After an hour, the Mind toiling with nothing but repeated Warnings & Desperate Strategies & Calculations of Escape—it resolves itself to distant Explosion & Danger.

From "The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume I: The Pox Party" by M.T. Anderson

Related Words

• blast
• burst
• detonation
• firing
• outbreak
• outburst