- 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.
Origin of underperform
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for underperformance
Over-optimistic forecasts, coupled with underperformance, have long been a GM bugaboo.Behind GM's Shock Shakeup
December 1, 2009