<p><strong>Noun</strong></p><ul><li>an act or instance of exploding; a violent expansion or bursting with noise, as of gunpowder or a boiler (implosion).</li><li>the noise itself: The loud explosion woke them.</li><li>a violent outburst, as of laughter or anger.</li><li>a sudden, rapid, or great increase: a population explosion.</li><li>the burning of the mixture of fuel and air in an internal-combustion engine.</li><li>Phonetics: plosion.</li></ul>