"keyman" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0 0",
      "word": "keyman insurance"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "key",
        "3": "man"
      },
      "expansion": "key + man",
      "name": "compound"
    }
  ],
  "etymology_text": "key + man",
  "forms": [
    {
      "form": "keymen",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "keymen"
      },
      "expansion": "keyman (plural keymen)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "58 29 13",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1932, Time (volume 19, part 2)",
          "text": "Conscious of their importance, the 324 labor delegates marched bravely in and elected by acclaim as their president a onetime Ontario telegraph keyman, Senator Gideon Decker Robertson […]"
        }
      ],
      "glosses": [
        "A telegraph operator."
      ],
      "id": "en-keyman-en-noun-f3~Q9AEZ",
      "links": [
        [
          "telegraph",
          "telegraph"
        ],
        [
          "operator",
          "operator"
        ]
      ],
      "raw_glosses": [
        "(dated) A telegraph operator."
      ],
      "tags": [
        "dated"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Indian English",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A workman who checks a railway track for faults, and who carries a keying hammer."
      ],
      "id": "en-keyman-en-noun-mdPPuzmU",
      "links": [
        [
          "workman",
          "workman"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "track",
          "track"
        ],
        [
          "fault",
          "fault"
        ],
        [
          "keying hammer",
          "keying hammer"
        ]
      ],
      "raw_glosses": [
        "(India) A workman who checks a railway track for faults, and who carries a keying hammer."
      ],
      "tags": [
        "India"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "ref": "1957, Pearce Shepherd, Andrew C. Webster, Selection of risks",
          "text": "A corporation may feel the need for life insurance on one of its keymen under a variety of circumstances.",
          "type": "quotation"
        },
        {
          "ref": "2000, Harvey C. Krentzman, The essentials of business management for profit, page 123",
          "text": "As the keymen learn how to handle confidential company information, the owner-manager can disclose more to them. In most very small firms, the keymen will be \"working\" bosses.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An employee of vital importance to a business."
      ],
      "id": "en-keyman-en-noun-bWZKqXyY",
      "links": [
        [
          "employee",
          "employee"
        ],
        [
          "business",
          "business"
        ]
      ]
    }
  ],
  "word": "keyman"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English nouns with irregular plurals"
  ],
  "derived": [
    {
      "word": "keyman insurance"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "key",
        "3": "man"
      },
      "expansion": "key + man",
      "name": "compound"
    }
  ],
  "etymology_text": "key + man",
  "forms": [
    {
      "form": "keymen",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "keymen"
      },
      "expansion": "keyman (plural keymen)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English dated terms"
      ],
      "examples": [
        {
          "ref": "1932, Time (volume 19, part 2)",
          "text": "Conscious of their importance, the 324 labor delegates marched bravely in and elected by acclaim as their president a onetime Ontario telegraph keyman, Senator Gideon Decker Robertson […]"
        }
      ],
      "glosses": [
        "A telegraph operator."
      ],
      "links": [
        [
          "telegraph",
          "telegraph"
        ],
        [
          "operator",
          "operator"
        ]
      ],
      "raw_glosses": [
        "(dated) A telegraph operator."
      ],
      "tags": [
        "dated"
      ]
    },
    {
      "categories": [
        "Indian English"
      ],
      "glosses": [
        "A workman who checks a railway track for faults, and who carries a keying hammer."
      ],
      "links": [
        [
          "workman",
          "workman"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "track",
          "track"
        ],
        [
          "fault",
          "fault"
        ],
        [
          "keying hammer",
          "keying hammer"
        ]
      ],
      "raw_glosses": [
        "(India) A workman who checks a railway track for faults, and who carries a keying hammer."
      ],
      "tags": [
        "India"
      ]
    },
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1957, Pearce Shepherd, Andrew C. Webster, Selection of risks",
          "text": "A corporation may feel the need for life insurance on one of its keymen under a variety of circumstances.",
          "type": "quotation"
        },
        {
          "ref": "2000, Harvey C. Krentzman, The essentials of business management for profit, page 123",
          "text": "As the keymen learn how to handle confidential company information, the owner-manager can disclose more to them. In most very small firms, the keymen will be \"working\" bosses.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An employee of vital importance to a business."
      ],
      "links": [
        [
          "employee",
          "employee"
        ],
        [
          "business",
          "business"
        ]
      ]
    }
  ],
  "word": "keyman"
}