"cold welding" meaning in English

{
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cold",
        "3": "welding"
      },
      "expansion": "cold + welding",
      "name": "compound"
    }
  ],
  "etymology_text": "cold + welding.\nFrom being a form of welding not requiring adding heat.",
  "head_templates": [
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      "expansion": "cold welding (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "_dis": "52 48",
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          "name": "English entries with incorrect language header",
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      ],
      "coordinate_terms": [
        {
          "english": "heat welding by molten temperatures",
          "word": "fusion welding"
        }
      ],
      "glosses": [
        "A phenomenon where in a vacuum, two clean oxide-less uncoated metal surfaces will fuse/weld/merge together when they come into contact with each other, without any other action required (without fusion heating)."
      ],
      "id": "en-cold_welding-en-noun-svVtp9Za",
      "links": [
        [
          "vacuum",
          "vacuum"
        ],
        [
          "metal",
          "metal"
        ]
      ],
      "related": [
        {
          "word": "cold shut"
        }
      ],
      "synonyms": [
        {
          "word": "contact welding"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "type of welding",
          "word": "kylmähitsaus"
        }
      ]
    }
  ],
  "wikipedia": [
    "en:cold welding"
  ],
  "word": "cold welding"
}

{
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cold weld",
        "3": "ing"
      },
      "expansion": "cold weld + -ing",
      "name": "suffix"
    }
  ],
  "etymology_text": "cold weld + -ing",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
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      "expansion": "cold welding",
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
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      ],
      "form_of": [
        {
          "word": "cold weld"
        }
      ],
      "glosses": [
        "present participle and gerund of cold weld"
      ],
      "id": "en-cold_welding-en-verb-7zKWvBHN",
      "links": [
        [
          "cold weld",
          "cold weld#English"
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  ],
  "wikipedia": [
    "en:cold welding"
  ],
  "word": "cold welding"
}

{
  "categories": [
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    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English nouns",
    "English terms suffixed with -ing",
    "English uncountable nouns",
    "English verb forms"
  ],
  "coordinate_terms": [
    {
      "english": "heat welding by molten temperatures",
      "word": "fusion welding"
    }
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cold",
        "3": "welding"
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      "expansion": "cold + welding",
      "name": "compound"
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  ],
  "etymology_text": "cold + welding.\nFrom being a form of welding not requiring adding heat.",
  "head_templates": [
    {
      "args": {
        "1": "-"
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      "expansion": "cold welding (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "cold shut"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A phenomenon where in a vacuum, two clean oxide-less uncoated metal surfaces will fuse/weld/merge together when they come into contact with each other, without any other action required (without fusion heating)."
      ],
      "links": [
        [
          "vacuum",
          "vacuum"
        ],
        [
          "metal",
          "metal"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "contact welding"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "type of welding",
      "word": "kylmähitsaus"
    }
  ],
  "wikipedia": [
    "en:cold welding"
  ],
  "word": "cold welding"
}

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  "etymology_number": 2,
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    {
      "args": {
        "1": "en",
        "2": "cold weld",
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  ],
  "etymology_text": "cold weld + -ing",
  "head_templates": [
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      "expansion": "cold welding",
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
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          "word": "cold weld"
        }
      ],
      "glosses": [
        "present participle and gerund of cold weld"
      ],
      "links": [
        [
          "cold weld",
          "cold weld#English"
        ]
      ],
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        "form-of",
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  ],
  "wikipedia": [
    "en:cold welding"
  ],
  "word": "cold welding"
}