"darkhorse" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "dark",
        "3": "horse"
      },
      "expansion": "dark + horse",
      "name": "compound"
    }
  ],
  "etymology_text": "dark + horse",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "darkhorse (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"
        }
      ],
      "derived": [
        {
          "word": "darkhorse candidate"
        }
      ],
      "examples": [
        {
          "ref": "2009 January 23, Ron Reed, “Quirky but still the wheel deal”, in Herald Sun, archived from the original on 2009-08-10",
          "text": "“He's a highly intelligent boy but a bit of a different character,” says Alan Peiper, the Australian who directs the big American team Columbia-Highroad, for which Hansen is a darkhorse contender in the Tour Down Under.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Having the character of a dark horse."
      ],
      "id": "en-darkhorse-en-adj-~ZAw~vAF",
      "links": [
        [
          "dark horse",
          "dark horse#English"
        ]
      ],
      "synonyms": [
        {
          "word": "dark-horse"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "darkhorse"
}

{
  "derived": [
    {
      "word": "darkhorse candidate"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "dark",
        "3": "horse"
      },
      "expansion": "dark + horse",
      "name": "compound"
    }
  ],
  "etymology_text": "dark + horse",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "darkhorse (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "2009 January 23, Ron Reed, “Quirky but still the wheel deal”, in Herald Sun, archived from the original on 2009-08-10",
          "text": "“He's a highly intelligent boy but a bit of a different character,” says Alan Peiper, the Australian who directs the big American team Columbia-Highroad, for which Hansen is a darkhorse contender in the Tour Down Under.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Having the character of a dark horse."
      ],
      "links": [
        [
          "dark horse",
          "dark horse#English"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "dark-horse"
    }
  ],
  "word": "darkhorse"
}