to function less effectively or be less successful than expected or required
to produce a smaller return than: said of stocks, mutual funds, etc.
verbun·der·per·formed, un·der·per·form·ing, un·der·per·forms
- To perform not as well as (something else): three stocks that underperformed the market as a whole.
- To perform (a musical or theatrical work, for example) too seldom: In recent years, her plays have been underperformed.
To exhibit a level of performance that is below the standard: a company that underperformed last year.
(third-person singular simple present underperforms, present participle underperforming, simple past and past participle underperformed)
under- +"Ž perform.