"epistolario" meaning in Italian

{
  "forms": [
    {
      "form": "epistolari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "epistolario m (plural epistolari)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "e‧pi‧sto‧là‧rio"
  ],
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "papal letters (collection)"
      ],
      "id": "en-epistolario-it-noun-5TPriZA3",
      "links": [
        [
          "papal",
          "papal"
        ],
        [
          "letter",
          "letter"
        ]
      ],
      "related": [
        {
          "word": "epistola"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/e.pi.stoˈla.rjo/"
    },
    {
      "rhymes": "-arjo"
    }
  ],
  "word": "epistolario"
}

{
  "forms": [
    {
      "form": "epistolari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "epistolario m (plural epistolari)",
      "name": "it-noun"
    }
  ],
  "hyphenation": [
    "e‧pi‧sto‧là‧rio"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "related": [
    {
      "word": "epistola"
    }
  ],
  "senses": [
    {
      "categories": [
        "Italian 5-syllable words",
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian nouns",
        "Italian terms with IPA pronunciation",
        "Pages with 2 entries",
        "Pages with entries",
        "Rhymes:Italian/arjo",
        "Rhymes:Italian/arjo/5 syllables"
      ],
      "glosses": [
        "papal letters (collection)"
      ],
      "links": [
        [
          "papal",
          "papal"
        ],
        [
          "letter",
          "letter"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/e.pi.stoˈla.rjo/"
    },
    {
      "rhymes": "-arjo"
    }
  ],
  "word": "epistolario"
}