"Appennini" meaning in Italian

{
  "forms": [
    {
      "form": "gli Appennini",
      "tags": [
        "canonical",
        "masculine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m-p",
        "head": "gli Appennini"
      },
      "expansion": "gli Appennini m pl (plural only)",
      "name": "it-proper noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "it",
          "name": "Mountains",
          "orig": "it:Mountains",
          "parents": [
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the Apennines"
      ],
      "id": "en-Appennini-it-name-4YgF04QK",
      "links": [
        [
          "Apennines",
          "Apennines"
        ]
      ],
      "tags": [
        "plural",
        "plural-only"
      ],
      "wikipedia": [
        "it:Appennini"
      ]
    }
  ],
  "word": "Appennini"
}

{
  "forms": [
    {
      "form": "gli Appennini",
      "tags": [
        "canonical",
        "masculine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m-p",
        "head": "gli Appennini"
      },
      "expansion": "gli Appennini m pl (plural only)",
      "name": "it-proper noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian pluralia tantum",
        "Italian proper nouns",
        "Requests for audio pronunciation in Italian entries",
        "Requests for pronunciation in Italian entries",
        "it:Mountains"
      ],
      "glosses": [
        "the Apennines"
      ],
      "links": [
        [
          "Apennines",
          "Apennines"
        ]
      ],
      "tags": [
        "plural",
        "plural-only"
      ],
      "wikipedia": [
        "it:Appennini"
      ]
    }
  ],
  "word": "Appennini"
}