"thirdsman" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "third",
        "3": "-s-",
        "4": "-man"
      },
      "expansion": "third + -s- + -man",
      "name": "af"
    }
  ],
  "etymology_text": "third + -s- + -man",
  "forms": [
    {
      "form": "thirdsmen",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "thirdsmen"
      },
      "expansion": "thirdsman (plural thirdsmen)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms interfixed with -s-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -man",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A third party who acts as mediator."
      ],
      "id": "en-thirdsman-en-noun-5biOs1-H",
      "links": [
        [
          "third party",
          "third party"
        ],
        [
          "mediator",
          "mediator"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A third party who acts as mediator."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "thirdsman"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "third",
        "3": "-s-",
        "4": "-man"
      },
      "expansion": "third + -s- + -man",
      "name": "af"
    }
  ],
  "etymology_text": "third + -s- + -man",
  "forms": [
    {
      "form": "thirdsmen",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "thirdsmen"
      },
      "expansion": "thirdsman (plural thirdsmen)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms interfixed with -s-",
        "English terms suffixed with -man",
        "English terms with obsolete senses"
      ],
      "glosses": [
        "A third party who acts as mediator."
      ],
      "links": [
        [
          "third party",
          "third party"
        ],
        [
          "mediator",
          "mediator"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A third party who acts as mediator."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "thirdsman"
}