"bronze age" meaning in English

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      "expansion": "bronze age",
      "name": "en-proper noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Bronze Age"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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      "examples": [
        {
          "ref": "1883, Edwin Guest, Origines Celticae (a Fragment)",
          "text": "In the first place in going back to the bronze age, we already find ourselves beyond the reach of history or even of tradition.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Bronze Age"
      ],
      "id": "en-bronze_age-en-name-CUmmVlaW",
      "links": [
        [
          "Bronze Age",
          "Bronze Age#English"
        ]
      ],
      "tags": [
        "alt-of"
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    }
  ],
  "word": "bronze age"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "bronze age",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Bronze Age"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1883, Edwin Guest, Origines Celticae (a Fragment)",
          "text": "In the first place in going back to the bronze age, we already find ourselves beyond the reach of history or even of tradition.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Bronze Age"
      ],
      "links": [
        [
          "Bronze Age",
          "Bronze Age#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "bronze age"
}