"underperforming" meaning in English

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        "present participle and gerund of underperform"
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  "word": "underperforming"
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  "antonyms": [
    {
      "word": "overperforming"
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  "forms": [
    {
      "form": "more underperforming",
      "tags": [
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      "form": "most underperforming",
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  "pos": "adj",
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          "ref": "2021 June 2, “Network News: Passenger service contracts”, in RAIL, number 932, page 9:",
          "text": "Underperforming operators will risk termination of their contracts.",
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      "glosses": [
        "That performs less well than required."
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          "word": "performing"
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  "word": "underperforming"
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  "pos": "verb",
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  "word": "underperforming"
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      "word": "overperforming"
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  "pos": "adj",
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        "That performs less well than required."
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  "word": "underperforming"
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