"imaginary museum" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "musée imaginaire"
      },
      "expansion": "Calque of French musée imaginaire",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of French musée imaginaire.",
  "forms": [
    {
      "form": "imaginary museums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "imaginary museum (plural imaginary museums)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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    {
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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        },
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        }
      ],
      "glosses": [
        "A person's essential or favorite works of art, regarded as a collection that could be brought together as a single ideal museum for that person."
      ],
      "id": "en-imaginary_museum-en-noun-Szr6LFVw",
      "links": [
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          "essential",
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          "favorite",
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        ],
        [
          "works of art",
          "work of art"
        ],
        [
          "regarded",
          "regarded"
        ],
        [
          "collection",
          "collection"
        ],
        [
          "ideal",
          "ideal"
        ],
        [
          "museum",
          "museum"
        ]
      ]
    }
  ],
  "word": "imaginary museum"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "musée imaginaire"
      },
      "expansion": "Calque of French musée imaginaire",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of French musée imaginaire.",
  "forms": [
    {
      "form": "imaginary museums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "imaginary museum (plural imaginary museums)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A person's essential or favorite works of art, regarded as a collection that could be brought together as a single ideal museum for that person."
      ],
      "links": [
        [
          "essential",
          "essential"
        ],
        [
          "favorite",
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        [
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        ],
        [
          "regarded",
          "regarded"
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  "word": "imaginary museum"
}