"counterfact" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "counter",
        "3": "fact"
      },
      "expansion": "counter- + fact",
      "name": "pre"
    }
  ],
  "etymology_text": "From counter- + fact.",
  "forms": [
    {
      "form": "counterfacts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "counterfact (plural counterfacts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "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 counter-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Alternate history",
          "orig": "en:Alternate history",
          "parents": [
            "History",
            "Speculative fiction",
            "All topics",
            "Fiction",
            "Genres",
            "Fundamental",
            "Artistic works",
            "Entertainment",
            "Art",
            "Culture",
            "Society"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A counterfactual."
      ],
      "id": "en-counterfact-en-noun-IEOCE82i",
      "links": [
        [
          "counterfactual",
          "counterfactual"
        ]
      ]
    }
  ],
  "word": "counterfact"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "counter",
        "3": "fact"
      },
      "expansion": "counter- + fact",
      "name": "pre"
    }
  ],
  "etymology_text": "From counter- + fact.",
  "forms": [
    {
      "form": "counterfacts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "counterfact (plural counterfacts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with counter-",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Alternate history"
      ],
      "glosses": [
        "A counterfactual."
      ],
      "links": [
        [
          "counterfactual",
          "counterfactual"
        ]
      ]
    }
  ],
  "word": "counterfact"
}