Found in the following dictionaries
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
OTCWL2014 (NASPA Word List 2014)
"Underperform" Definition
verb-intransitive
To exhibit a level of performance that is below the standard: Defense industry companies have underperformed during the last two quarters.
Source: American Heritage Dictionary
verb-transitive
To perform (a musical or theatrical work, for example) too seldom: In recent years, her plays have been underperformed.
Source: American Heritage Dictionary
To perform not as well as (something else): three stocks that underperformed the market as a whole.
Source: American Heritage Dictionary
verb
To do worse than.
Source: Merriam-Webster
To fail to do as well as expected.
Source: Merriam-Webster
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