"underpressure" meaning in English

{
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      "word": "overpressure"
    }
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        "1": "en",
        "2": "under",
        "3": "pressure"
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      "expansion": "under- + pressure",
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  ],
  "etymology_text": "From under- + pressure.",
  "forms": [
    {
      "form": "underpressures",
      "tags": [
        "plural"
      ]
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      "expansion": "underpressure (plural underpressures)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "examples": [
        {
          "ref": "2007, Vladimir A. Rakov, Martin A. Uman, Lightning: Physics and Effects, page 378:",
          "text": "The expanding-hot-channel mechanism predicts an initial positive pressure change (an overpressure) while the electrostatic-pressure-relief mechanism predicts an initial negative pressure change (an underpressure).",
          "type": "quote"
        }
      ],
      "glosses": [
        "insufficient pressure; a marked drop in pressure"
      ],
      "id": "en-underpressure-en-noun-BnhYUIU9",
      "links": [
        [
          "insufficient",
          "insufficient"
        ],
        [
          "drop",
          "drop"
        ],
        [
          "pressure",
          "pressure"
        ]
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "insufficient pressure",
          "tags": [
            "masculine"
          ],
          "word": "podtlak"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "insufficient pressure",
          "word": "alipaine"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "insufficient pressure",
          "tags": [
            "masculine"
          ],
          "word": "Unterdruck"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "insufficient pressure",
          "tags": [
            "neuter"
          ],
          "word": "undertryck"
        }
      ]
    }
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  "word": "underpressure"
}

{
  "antonyms": [
    {
      "word": "overpressure"
    }
  ],
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        "2": "under",
        "3": "pressure"
      },
      "expansion": "under- + pressure",
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    }
  ],
  "etymology_text": "From under- + pressure.",
  "forms": [
    {
      "form": "underpressures",
      "tags": [
        "plural"
      ]
    }
  ],
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    {
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      "expansion": "underpressure (plural underpressures)",
      "name": "en-noun"
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  "lang_code": "en",
  "pos": "noun",
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        "Terms with Swedish translations"
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          "ref": "2007, Vladimir A. Rakov, Martin A. Uman, Lightning: Physics and Effects, page 378:",
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          "type": "quote"
        }
      ],
      "glosses": [
        "insufficient pressure; a marked drop in pressure"
      ],
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        [
          "insufficient",
          "insufficient"
        ],
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          "drop",
          "drop"
        ],
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          "pressure",
          "pressure"
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  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "insufficient pressure",
      "tags": [
        "masculine"
      ],
      "word": "podtlak"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "insufficient pressure",
      "word": "alipaine"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "insufficient pressure",
      "tags": [
        "masculine"
      ],
      "word": "Unterdruck"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "insufficient pressure",
      "tags": [
        "neuter"
      ],
      "word": "undertryck"
    }
  ],
  "word": "underpressure"
}