"cab-rank rule" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cab off the rank"
      },
      "expansion": "cab off the rank",
      "name": "m"
    }
  ],
  "etymology_text": "See cab off the rank.",
  "forms": [
    {
      "form": "the cab-rank rule",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "cab-rank rule"
      },
      "expansion": "the cab-rank rule",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Law",
          "orig": "en:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The obligation of a barrister (in certain jurisdictions) to accept any work in a field in which they profess themselves competent to practise, at a court at which they normally appear, and at their usual rates."
      ],
      "id": "en-cab-rank_rule-en-name-GiX5fXKc",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "obligation",
          "obligation"
        ],
        [
          "barrister",
          "barrister"
        ],
        [
          "jurisdiction",
          "jurisdiction"
        ],
        [
          "accept",
          "accept"
        ],
        [
          "work",
          "work"
        ],
        [
          "field",
          "field"
        ],
        [
          "profess",
          "profess"
        ],
        [
          "competent",
          "competent"
        ],
        [
          "court",
          "court"
        ],
        [
          "rate",
          "rate"
        ]
      ],
      "raw_glosses": [
        "(law) The obligation of a barrister (in certain jurisdictions) to accept any work in a field in which they profess themselves competent to practise, at a court at which they normally appear, and at their usual rates."
      ],
      "topics": [
        "law"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "obligation",
          "word": "不得拒聘原則"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "bùdé jùpìn yuánzé",
          "sense": "obligation",
          "word": "不得拒聘原则"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "obligation",
          "word": "asianajajalle pakollisia työtehtäviä määräävä periaate"
        }
      ],
      "wikipedia": [
        "cab-rank rule"
      ]
    }
  ],
  "word": "cab-rank rule"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cab off the rank"
      },
      "expansion": "cab off the rank",
      "name": "m"
    }
  ],
  "etymology_text": "See cab off the rank.",
  "forms": [
    {
      "form": "the cab-rank rule",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "cab-rank rule"
      },
      "expansion": "the cab-rank rule",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
        "en:Law"
      ],
      "glosses": [
        "The obligation of a barrister (in certain jurisdictions) to accept any work in a field in which they profess themselves competent to practise, at a court at which they normally appear, and at their usual rates."
      ],
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "obligation",
          "obligation"
        ],
        [
          "barrister",
          "barrister"
        ],
        [
          "jurisdiction",
          "jurisdiction"
        ],
        [
          "accept",
          "accept"
        ],
        [
          "work",
          "work"
        ],
        [
          "field",
          "field"
        ],
        [
          "profess",
          "profess"
        ],
        [
          "competent",
          "competent"
        ],
        [
          "court",
          "court"
        ],
        [
          "rate",
          "rate"
        ]
      ],
      "raw_glosses": [
        "(law) The obligation of a barrister (in certain jurisdictions) to accept any work in a field in which they profess themselves competent to practise, at a court at which they normally appear, and at their usual rates."
      ],
      "topics": [
        "law"
      ],
      "wikipedia": [
        "cab-rank rule"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "obligation",
      "word": "不得拒聘原則"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "bùdé jùpìn yuánzé",
      "sense": "obligation",
      "word": "不得拒聘原则"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "obligation",
      "word": "asianajajalle pakollisia työtehtäviä määräävä periaate"
    }
  ],
  "word": "cab-rank rule"
}