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v. un·der·per·formed, un·der·per·form·ing, un·der·per·forms
1. To perform not as well as (something else): three stocks that underperformed the market as a whole.
2. 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.

un′der·per·for′mance n.
un′der·per·form′er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.underperformer - a student who does not perform as well as expected or as well as the IQ indicatesunderperformer - a student who does not perform as well as expected or as well as the IQ indicates
educatee, pupil, student - a learner who is enrolled in an educational institution
2.underperformer - a business that is less successful than expectedunderperformer - a business that is less successful than expected
business, business concern, business organisation, business organization, concern - a commercial or industrial enterprise and the people who constitute it; "he bought his brother's business"; "a small mom-and-pop business"; "a racially integrated business concern"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
FX Update: The yen went from outperformer to underperformer after China's commerce ministry affirmed that September trade talks are not off the table.
According to the most recent rating by CIBC, on July 26, the current rating is at Underperformer.
Going by the standard the bank spelt out, Tony Elumelu was an underperformer and should not have been considered for recruitment at all.
On the flip side, banking sector stood out as a major underperformer with Bank Al Habib down 2.29pc, MCB 1.71pc, Habib Bank 0.69pc and National Bank 2.10pc.
The region is still a big underperformer on a global scale in terms of ad spend, as you will see from the Zenith figures and other estimates throughout this supplement.
Travel and tourism remained the underperformer, falling from 52.8 to 52.0, compared to wholesale and retail trade's 54.2.
Trump has described the United Nations as an "underperformer" but stressed that it has "huge potential" to address the long list of world crises that it has "huge potential" to address the long list of world crises that will be at the centre of this year's UN debate.
You know how critical every sale is to your business, and having an underperformer like Justin on the salesfloor could jeopardize profits.
The British FTSE 100 was the major underperformer, down 0.4 percent as stocks such as Shell and Rio Tinto traded ex-dividend, trimming 37 points off the index.
That is already one more than in London, when swimming was seen as the major underperformer in a successful Games.
Revlon and Garnier -- a rare underperformer for China market leader L'Oreal have announced their pullout from China.
William Hill was a notable underperformer as investors continue to shun the stock following last week's budget plans that will see an increase in the duty on fixed odds betting terminals.