"castagnaia" meaning in Italian

{
  "forms": [
    {
      "form": "castagnaie",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "castagnaia f (plural castagnaie)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "ca‧sta‧gnà‧ia"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "castagnaio"
        }
      ],
      "glosses": [
        "female equivalent of castagnaio"
      ],
      "id": "en-castagnaia-it-noun-QSK6r6Lz",
      "links": [
        [
          "castagnaio",
          "castagnaio#Italian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ka.staɲˈɲa.ja/"
    },
    {
      "rhymes": "-aja"
    }
  ],
  "word": "castagnaia"
}

{
  "forms": [
    {
      "form": "castagnaie",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "castagnaia f (plural castagnaie)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "ca‧sta‧gnà‧ia"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian 4-syllable words",
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian female equivalent nouns",
        "Italian feminine nouns",
        "Italian lemmas",
        "Italian nouns",
        "Italian terms with IPA pronunciation",
        "Rhymes:Italian/aja",
        "Rhymes:Italian/aja/4 syllables"
      ],
      "form_of": [
        {
          "word": "castagnaio"
        }
      ],
      "glosses": [
        "female equivalent of castagnaio"
      ],
      "links": [
        [
          "castagnaio",
          "castagnaio#Italian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ka.staɲˈɲa.ja/"
    },
    {
      "rhymes": "-aja"
    }
  ],
  "word": "castagnaia"
}