"unrepeated" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "repeated"
      },
      "expansion": "un- + repeated",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + repeated",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unrepeated (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with un-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "This accomplishment had been unrepeated, until now."
        },
        {
          "ref": "2009 January 12, Steve Smith, “Worlds Apart: Harmonies Earthbound and Lunar”, in New York Times",
          "text": "Sentimentality is the last thing that comes to mind in Schoenberg's \"Pierrot Lunaire,\" a 1912 piece seemingly without precedent, and an unrepeated stylistic cul de sac.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Not having been repeated"
      ],
      "id": "en-unrepeated-en-adj-kjD6x-vX",
      "links": [
        [
          "repeat",
          "repeat"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "unrepeated"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "repeated"
      },
      "expansion": "un- + repeated",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + repeated",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unrepeated (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with un-",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "text": "This accomplishment had been unrepeated, until now."
        },
        {
          "ref": "2009 January 12, Steve Smith, “Worlds Apart: Harmonies Earthbound and Lunar”, in New York Times",
          "text": "Sentimentality is the last thing that comes to mind in Schoenberg's \"Pierrot Lunaire,\" a 1912 piece seemingly without precedent, and an unrepeated stylistic cul de sac.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Not having been repeated"
      ],
      "links": [
        [
          "repeat",
          "repeat"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "unrepeated"
}