"plummetting" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "plummetting",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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      ],
      "examples": [
        {
          "ref": "2009 February 23, Dan Milmo, “Mandelson, the oligarch and a £25m bail-out plea”, in The Guardian",
          "text": "Thousands of workers are being axed at car plants across the UK as plummetting sales force production cutbacks.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "extra": "alternative spelling of plummeting",
          "word": "plummet"
        }
      ],
      "glosses": [
        "present participle and gerund of plummet; alternative spelling of plummeting"
      ],
      "id": "en-plummetting-en-verb-XWi2E40Z",
      "links": [
        [
          "plummet",
          "plummet#English"
        ],
        [
          "plummeting",
          "plummeting#English"
        ]
      ],
      "raw_glosses": [
        "(British) present participle and gerund of plummet; alternative spelling of plummeting"
      ],
      "tags": [
        "British",
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "plummetting"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "plummetting",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English terms with quotations",
        "English verb forms"
      ],
      "examples": [
        {
          "ref": "2009 February 23, Dan Milmo, “Mandelson, the oligarch and a £25m bail-out plea”, in The Guardian",
          "text": "Thousands of workers are being axed at car plants across the UK as plummetting sales force production cutbacks.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "extra": "alternative spelling of plummeting",
          "word": "plummet"
        }
      ],
      "glosses": [
        "present participle and gerund of plummet; alternative spelling of plummeting"
      ],
      "links": [
        [
          "plummet",
          "plummet#English"
        ],
        [
          "plummeting",
          "plummeting#English"
        ]
      ],
      "raw_glosses": [
        "(British) present participle and gerund of plummet; alternative spelling of plummeting"
      ],
      "tags": [
        "British",
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "plummetting"
}