explosion
US /ɪkˈsploʊ.ʒən/
UK /ɪkˈsploʊ.ʒən/

1.
a violent bursting with a loud noise, caused by the sudden release of energy
:
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The building was severely damaged by the explosion.
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There was a loud explosion that shook the entire neighborhood.
2.
a sudden, rapid, and often dramatic increase in number or amount
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There has been an explosion in the number of mobile phone users.
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The city experienced a population explosion in the last decade.