"mega-gallery" meaning in English

{
  "forms": [
    {
      "form": "mega-galleries",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "mega-gallery"
      },
      "expansion": "mega-gallery (plural mega-galleries)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "megagallery"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 February 7, Melanie Gerlis, “Avery Singer: the artist breathing fresh life into painting”, in Financial Times",
          "text": "The artist has capitalised on the momentum. In December, she announced on Instagram that she had joined the mega-gallery Hauser & Wirth, in collaboration with her Berlin representative Kraupa-Tuskany Zeidler (having broken off from her New York gallery of three years, Gavin Brown).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of megagallery"
      ],
      "id": "en-mega-gallery-en-noun-nGEeIiEs",
      "links": [
        [
          "megagallery",
          "megagallery#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "mega-gallery"
}

{
  "forms": [
    {
      "form": "mega-galleries",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "mega-gallery"
      },
      "expansion": "mega-gallery (plural mega-galleries)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "megagallery"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2020 February 7, Melanie Gerlis, “Avery Singer: the artist breathing fresh life into painting”, in Financial Times",
          "text": "The artist has capitalised on the momentum. In December, she announced on Instagram that she had joined the mega-gallery Hauser & Wirth, in collaboration with her Berlin representative Kraupa-Tuskany Zeidler (having broken off from her New York gallery of three years, Gavin Brown).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of megagallery"
      ],
      "links": [
        [
          "megagallery",
          "megagallery#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "mega-gallery"
}