"gran cassa" meaning in Italien

{
  "categories": [
    {
      "kind": "other",
      "name": "Instruments de musique en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Italien",
      "orig": "italien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "De l'adjectif gran («grand») et du nom cassa («tambour»)."
  ],
  "forms": [
    {
      "form": "gran casse",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en italien de la musique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Variante de grancassa."
      ],
      "id": "fr-gran_cassa-it-noun-cGev0kam",
      "topics": [
        "music"
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "gran cassa"
}

{
  "categories": [
    "Instruments de musique en italien",
    "Locutions nominales en italien",
    "italien"
  ],
  "etymology_texts": [
    "De l'adjectif gran («grand») et du nom cassa («tambour»)."
  ],
  "forms": [
    {
      "form": "gran casse",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en italien de la musique"
      ],
      "glosses": [
        "Variante de grancassa."
      ],
      "topics": [
        "music"
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "gran cassa"
}