"nine day wonder" meaning in English

{
  "forms": [
    {
      "form": "nine day wonders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "nine day wonder (plural nine day wonders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "nine-day wonder"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1993 December, Brian Stableford, “The Cure for Love”, in The Cure for Love and Other Tales of the Biotech Revolution, [Rockville, Md.]: Borgo Press, published 2007, page 40",
          "text": "So far as we're concerned, the ashes of Endymion can stay buried for another two hundred years—or another two million. It doesn't matter; come the day when somebody stumbles over the tombstones, they'll just be an archaeological find: a nine day wonder. By then, we'll be out among the stars. Earth will be just our cradle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of nine-day wonder"
      ],
      "id": "en-nine_day_wonder-en-noun-GDZ~mov6",
      "links": [
        [
          "nine-day wonder",
          "nine-day wonder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "nine day wonder"
}

{
  "forms": [
    {
      "form": "nine day wonders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "nine day wonder (plural nine day wonders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "nine-day wonder"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1993 December, Brian Stableford, “The Cure for Love”, in The Cure for Love and Other Tales of the Biotech Revolution, [Rockville, Md.]: Borgo Press, published 2007, page 40",
          "text": "So far as we're concerned, the ashes of Endymion can stay buried for another two hundred years—or another two million. It doesn't matter; come the day when somebody stumbles over the tombstones, they'll just be an archaeological find: a nine day wonder. By then, we'll be out among the stars. Earth will be just our cradle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of nine-day wonder"
      ],
      "links": [
        [
          "nine-day wonder",
          "nine-day wonder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "nine day wonder"
}