"umbral" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "umbral algebra"
    },
    {
      "_dis1": "0 0",
      "word": "umbral calculus"
    },
    {
      "_dis1": "0 0",
      "word": "umbral moonshine"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "umbral (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "Of or relating to an umbra."
      ],
      "id": "en-umbral-en-adj-9Gw5HtNn",
      "links": [
        [
          "umbra",
          "umbra"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "1 73 2 6 6 8 3",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "1 83 1 4 4 5 2",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Of or relating to umbral calculus."
      ],
      "id": "en-umbral-en-adj-2eoxvQW6",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "umbral calculus",
          "umbral calculus"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Of or relating to umbral calculus."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈʌmbɹəl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-umbral.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/05/LL-Q1860_%28eng%29-Vealhurl-umbral.wav/LL-Q1860_%28eng%29-Vealhurl-umbral.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/05/LL-Q1860_%28eng%29-Vealhurl-umbral.wav/LL-Q1860_%28eng%29-Vealhurl-umbral.wav.ogg"
    },
    {
      "rhymes": "-ʌmbɹəl"
    },
    {
      "homophone": "umbrel"
    }
  ],
  "word": "umbral"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English terms with homophones",
    "English uncomparable adjectives",
    "Pages with 3 entries",
    "Pages with entries",
    "Rhymes:English/ʌmbɹəl",
    "Rhymes:English/ʌmbɹəl/2 syllables"
  ],
  "derived": [
    {
      "word": "umbral algebra"
    },
    {
      "word": "umbral calculus"
    },
    {
      "word": "umbral moonshine"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "umbral (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "Of or relating to an umbra."
      ],
      "links": [
        [
          "umbra",
          "umbra"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        "en:Mathematics"
      ],
      "glosses": [
        "Of or relating to umbral calculus."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "umbral calculus",
          "umbral calculus"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Of or relating to umbral calculus."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈʌmbɹəl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-umbral.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/05/LL-Q1860_%28eng%29-Vealhurl-umbral.wav/LL-Q1860_%28eng%29-Vealhurl-umbral.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/05/LL-Q1860_%28eng%29-Vealhurl-umbral.wav/LL-Q1860_%28eng%29-Vealhurl-umbral.wav.ogg"
    },
    {
      "rhymes": "-ʌmbɹəl"
    },
    {
      "homophone": "umbrel"
    }
  ],
  "word": "umbral"
}