from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To perform not as well as (something else): three stocks that underperformed the market as a whole.
- transitive v. To perform (a musical or theatrical work, for example) too seldom: In recent years, her plays have been underperformed.
- intransitive v. To exhibit a level of performance that is below the standard: Defense industry companies have underperformed during the last two quarters.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To underachieve, to not reach standards or expectations, especially with respect to a financial investment.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. perform less well or with less success than expected
- v. perform too rarely
under- + perform. (Wiktionary)