GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Explosion (?), n. [L. explosio a driving off by clapping: cf. F. explosion explosion. See Explode.]
   1. The act of exploding; detonation; a chemical action which causes the sudden formation of a great volume of expanded gas; as, “the explosion of gunpowder, of fire damp, etc.”
   
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   2. A bursting with violence and loud noise, because of internal pressure; as, “the explosion of a gun, a bomb, a steam boiler, etc.”
   
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   3. A violent outburst of feeling, manifested by excited language, action, etc.; as, “an explosion of wrath”.
   
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   A formidable explosion of high-church fanaticism. Macaulay.
   
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   4. a sudden and substantial increase; a rapid acceleration; as, “the population explosion”.
   
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