The meaning of UNDERPERFORM is to do worse than. How to use underperform in a sentence. to do worse than; to fail to do as well as expected… See the full definition. Games; Games; Word of the Day; Grammar; Wordplay; Rhymes; Word Finder; Thesaurus; Join MWU; Shop; Books; Merch; Settings; My Words; Recents; Account; More @Wikipedia
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