"black as ink" meaning in English

{
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      "args": {
        "1": "-",
        "head": "(as) black as ink"
      },
      "expansion": "(as) black as ink (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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          "ref": "1923, Ernest Bramah [pseudonym; Ernest Brammah Smith], “(please specify the page)”, in The Eyes of Max Carrados, London: Grant Richards, →OCLC:",
          "text": "He opened a second bag and, shaking out the contents, displayed another little heap by the side of the first. \"Gathered four days ago,\" he explained.\n\"Why, they are as black as ink,\" commented Loudham. \"And the, phew! aroma!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Completely black; pitch-black."
      ],
      "id": "en-black_as_ink-en-adj-3ObClOoJ",
      "links": [
        [
          "black",
          "black"
        ],
        [
          "pitch-black",
          "pitch-black"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Completely black; pitch-black."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "black as ink"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "(as) black as ink"
      },
      "expansion": "(as) black as ink (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
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        "English adjectives",
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          "ref": "1923, Ernest Bramah [pseudonym; Ernest Brammah Smith], “(please specify the page)”, in The Eyes of Max Carrados, London: Grant Richards, →OCLC:",
          "text": "He opened a second bag and, shaking out the contents, displayed another little heap by the side of the first. \"Gathered four days ago,\" he explained.\n\"Why, they are as black as ink,\" commented Loudham. \"And the, phew! aroma!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Completely black; pitch-black."
      ],
      "links": [
        [
          "black",
          "black"
        ],
        [
          "pitch-black",
          "pitch-black"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Completely black; pitch-black."
      ],
      "tags": [
        "not-comparable"
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    }
  ],
  "word": "black as ink"
}