"phænomenal" meaning in English

{
  "forms": [
    {
      "form": "more phænomenal",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most phænomenal",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "phænomenal (comparative more phænomenal, superlative most phænomenal)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "phenomenal"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1867, David Mather Masson, Recent British Philosophy, Macmillan and Company, Second Edition, Chapter IV, page #212",
          "text": "They both agree that only the phænomenal can be known, but they differ as to what is to be taken as the sum or composition of the phænomenal.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Archaic spelling of phenomenal."
      ],
      "id": "en-phænomenal-en-adj-ZpY6PA-u",
      "links": [
        [
          "phenomenal",
          "phenomenal#English"
        ]
      ],
      "tags": [
        "alt-of",
        "archaic"
      ]
    }
  ],
  "word": "phænomenal"
}

{
  "forms": [
    {
      "form": "more phænomenal",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most phænomenal",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "phænomenal (comparative more phænomenal, superlative most phænomenal)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "phenomenal"
        }
      ],
      "categories": [
        "English adjectives",
        "English archaic forms",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms spelled with Æ",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1867, David Mather Masson, Recent British Philosophy, Macmillan and Company, Second Edition, Chapter IV, page #212",
          "text": "They both agree that only the phænomenal can be known, but they differ as to what is to be taken as the sum or composition of the phænomenal.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Archaic spelling of phenomenal."
      ],
      "links": [
        [
          "phenomenal",
          "phenomenal#English"
        ]
      ],
      "tags": [
        "alt-of",
        "archaic"
      ]
    }
  ],
  "word": "phænomenal"
}