A sudden and violent increase in volume accompanied by noise and release of energy, as from a chemical change, nuclear reaction, or escape of gases or vapors under pressure. [L. explosio, fr. explodo, to drive away by clapping]
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ex·plo·sion ik-'splō-zhən n the act or an instance of exploding
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ex·plo·sion (ek-sploґzhən) [L. explosio] 1. the act of exploding. 2. a sudden and violent outbreak, as of emotion.Medical dictionary. 2011.