"grayest" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
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      "expansion": "grayest",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "most gray",
          "word": "gray"
        }
      ],
      "glosses": [
        "superlative form of gray: most gray"
      ],
      "id": "en-grayest-en-adj-4OpkQhwK",
      "links": [
        [
          "gray",
          "gray#English"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɡɹeɪ.ɪst/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "word": "grayest"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
      },
      "expansion": "grayest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English 2-syllable words",
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English superlative adjectives",
        "English terms with IPA pronunciation"
      ],
      "form_of": [
        {
          "extra": "most gray",
          "word": "gray"
        }
      ],
      "glosses": [
        "superlative form of gray: most gray"
      ],
      "links": [
        [
          "gray",
          "gray#English"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɡɹeɪ.ɪst/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "word": "grayest"
}