"balloon back" meaning in English

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      "expansion": "balloon back",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Furniture",
          "orig": "en:Furniture",
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            "Home",
            "Society",
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            "Fundamental"
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          "source": "w"
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      ],
      "glosses": [
        "A chairback of rounded shape which tapers to form a balloon shape at the seat."
      ],
      "id": "en-balloon_back-en-noun-ow5YcSUC",
      "links": [
        [
          "furniture",
          "furniture"
        ],
        [
          "chairback",
          "chairback"
        ],
        [
          "rounded",
          "rounded"
        ],
        [
          "shape",
          "shape"
        ],
        [
          "taper",
          "taper"
        ],
        [
          "balloon",
          "balloon"
        ],
        [
          "seat",
          "seat"
        ]
      ],
      "raw_glosses": [
        "(historical, furniture) A chairback of rounded shape which tapers to form a balloon shape at the seat."
      ],
      "synonyms": [
        {
          "word": "balloon-back"
        }
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "furniture",
        "lifestyle"
      ]
    }
  ],
  "word": "balloon back"
}

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      "expansion": "balloon back",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Furniture"
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      "glosses": [
        "A chairback of rounded shape which tapers to form a balloon shape at the seat."
      ],
      "links": [
        [
          "furniture",
          "furniture"
        ],
        [
          "chairback",
          "chairback"
        ],
        [
          "rounded",
          "rounded"
        ],
        [
          "shape",
          "shape"
        ],
        [
          "taper",
          "taper"
        ],
        [
          "balloon",
          "balloon"
        ],
        [
          "seat",
          "seat"
        ]
      ],
      "raw_glosses": [
        "(historical, furniture) A chairback of rounded shape which tapers to form a balloon shape at the seat."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "furniture",
        "lifestyle"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "balloon-back"
    }
  ],
  "word": "balloon back"
}