exponentially
US /ˌek.spoʊˈnen.ʃəl.i/
UK /ˌek.spoʊˈnen.ʃəl.i/

1.
at a very rapid rate
:
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The company's profits grew exponentially last quarter.
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The problem is getting worse exponentially.
2.
in a way that involves an exponent or exponents
:
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The function grows exponentially, meaning its rate of growth increases over time.
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In mathematics, some sequences increase exponentially.