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.
(third-person singular simple present underperforms, present participle underperforming, simple past and past participle underperformed)
under- +"Ž perform.