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[uhn-der-per-fawrm] /ˌʌn dər pərˈfɔrm/
verb (used with or without object)
to perform less well than (another of its kind, a general average, etc.) or less well than expected:
Surprisingly, the stock has underperformed the market indexes all year. Several of our best players consistently underperform.
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underperformance, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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