"gunmetal gray" meaning in English

{
  "forms": [
    {
      "form": "gunmetal grays",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {
        "1": "~"
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      "expansion": "gunmetal gray (countable and uncountable, plural gunmetal grays)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gunmetal grey"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Greys",
          "orig": "en:Greys",
          "parents": [
            "Colors",
            "Light",
            "Vision",
            "Energy",
            "Senses",
            "Nature",
            "Perception",
            "All topics",
            "Body",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "tags": [
            "adjective"
          ],
          "word": "gunmetal-gray"
        }
      ],
      "examples": [
        {
          "ref": "2012, John Locke, Wish List (Donovan Creed), John Locke Books, page 18",
          "text": "She's wearing a gunmetal gray dress that’s tasteful in front, and practically obscene from the back.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of gunmetal grey."
      ],
      "id": "en-gunmetal_gray-en-noun-f6FqKs3u",
      "links": [
        [
          "gunmetal grey",
          "gunmetal grey#English"
        ]
      ],
      "raw_glosses": [
        "(US) Alternative spelling of gunmetal grey."
      ],
      "tags": [
        "US",
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "gunmetal gray"
}

{
  "derived": [
    {
      "tags": [
        "adjective"
      ],
      "word": "gunmetal-gray"
    }
  ],
  "forms": [
    {
      "form": "gunmetal grays",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "gunmetal gray (countable and uncountable, plural gunmetal grays)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gunmetal grey"
        }
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        "English countable nouns",
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        "English uncountable nouns",
        "en:Greys"
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      "examples": [
        {
          "ref": "2012, John Locke, Wish List (Donovan Creed), John Locke Books, page 18",
          "text": "She's wearing a gunmetal gray dress that’s tasteful in front, and practically obscene from the back.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of gunmetal grey."
      ],
      "links": [
        [
          "gunmetal grey",
          "gunmetal grey#English"
        ]
      ],
      "raw_glosses": [
        "(US) Alternative spelling of gunmetal grey."
      ],
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      ]
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  ],
  "word": "gunmetal gray"
}