"black cab" meaning in English

{
  "etymology_text": "So-called because they were originally painted black; nowadays they can be any colour, but are still referred to as black cabs.",
  "forms": [
    {
      "form": "black cabs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black cab (plural black cabs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "London",
          "orig": "en:London",
          "parents": [
            "Greater London, England",
            "England",
            "United Kingdom",
            "British Isles",
            "Europe",
            "Islands",
            "Earth",
            "Eurasia",
            "Places",
            "Nature",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Vehicles",
          "orig": "en:Vehicles",
          "parents": [
            "Machines",
            "Transport",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2023 February 8, Greg Morse, “Crossing the border... by Sleeper”, in RAIL, number 976, page 45",
          "text": "Sitting in a black cab as it speeds away into the traffic, I check my bag. There, hiding in the bottom corner, I find a hand and body wash with the Caledonian Sleeper logo on it. I hadn't used it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A traditional London-style taxi; a hackney carriage."
      ],
      "id": "en-black_cab-en-noun-K53l2kKR",
      "links": [
        [
          "taxi",
          "taxi"
        ],
        [
          "hackney carriage",
          "hackney carriage"
        ]
      ],
      "raw_glosses": [
        "(British) A traditional London-style taxi; a hackney carriage."
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "word": "black cab"
}

{
  "etymology_text": "So-called because they were originally painted black; nowadays they can be any colour, but are still referred to as black cabs.",
  "forms": [
    {
      "form": "black cabs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black cab (plural black cabs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:London",
        "en:Vehicles"
      ],
      "examples": [
        {
          "ref": "2023 February 8, Greg Morse, “Crossing the border... by Sleeper”, in RAIL, number 976, page 45",
          "text": "Sitting in a black cab as it speeds away into the traffic, I check my bag. There, hiding in the bottom corner, I find a hand and body wash with the Caledonian Sleeper logo on it. I hadn't used it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A traditional London-style taxi; a hackney carriage."
      ],
      "links": [
        [
          "taxi",
          "taxi"
        ],
        [
          "hackney carriage",
          "hackney carriage"
        ]
      ],
      "raw_glosses": [
        "(British) A traditional London-style taxi; a hackney carriage."
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "word": "black cab"
}