"head shunt" meaning in English

{
  "forms": [
    {
      "form": "head shunts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "head shunt (plural head shunts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "headshunt"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1962 October, G. Freeman Allen, “The New Look in Scotland's Northern Division—II”, in Modern Railways, page 271",
          "text": "This is of unusual importance at Perth, compared with other modern yards, because the restricted scope for layout development precluded provision of a separate track as a head shunt at the southern end of the yard site. When such a facility is required, the main line has to be employed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of headshunt"
      ],
      "id": "en-head_shunt-en-noun-uLNsLLnb",
      "links": [
        [
          "headshunt",
          "headshunt#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "head shunt"
}

{
  "forms": [
    {
      "form": "head shunts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "head shunt (plural head shunts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "headshunt"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1962 October, G. Freeman Allen, “The New Look in Scotland's Northern Division—II”, in Modern Railways, page 271",
          "text": "This is of unusual importance at Perth, compared with other modern yards, because the restricted scope for layout development precluded provision of a separate track as a head shunt at the southern end of the yard site. When such a facility is required, the main line has to be employed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of headshunt"
      ],
      "links": [
        [
          "headshunt",
          "headshunt#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "head shunt"
}