"三連複" meaning in Japanese

{
  "forms": [
    {
      "form": "三連複",
      "ruby": [
        [
          "三",
          "さん"
        ],
        [
          "連",
          "れん"
        ],
        [
          "複",
          "ぷく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "sanrenpuku",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "さんれんぷく",
      "roman": "sanrenpuku",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "さんれんぷく",
        "hhira": "さんれんぷく"
      },
      "expansion": "三(さん)連(れん)複(ぷく) • (sanrenpuku) ^(←さんれんぷく (sanrenpuku)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "ja",
          "name": "Horse racing",
          "orig": "ja:Horse racing",
          "parents": [
            "Equestrianism",
            "Horses",
            "Sports",
            "Equids",
            "Livestock",
            "Human activity",
            "Odd-toed ungulates",
            "Agriculture",
            "Animals",
            "Human behaviour",
            "Mammals",
            "Applied sciences",
            "Lifeforms",
            "Human",
            "Vertebrates",
            "Sciences",
            "All topics",
            "Life",
            "Chordates",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "roman": "sanrentan",
          "ruby": [
            [
              "三連単",
              "さんれんたん"
            ]
          ],
          "word": "三連単"
        }
      ],
      "glosses": [
        "betting on the first 3 winning horses, in any order"
      ],
      "id": "en-三連複-ja-noun-MHK817tx",
      "links": [
        [
          "horse racing",
          "horse racing"
        ],
        [
          "betting",
          "betting"
        ]
      ],
      "raw_glosses": [
        "(horse racing) betting on the first 3 winning horses, in any order"
      ],
      "topics": [
        "hobbies",
        "horse-racing",
        "horseracing",
        "horses",
        "lifestyle",
        "pets",
        "racing",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[sã̠nɾẽ̞mpɯ̟ᵝkɯ̟ᵝ]"
    }
  ],
  "word": "三連複"
}

{
  "coordinate_terms": [
    {
      "roman": "sanrentan",
      "ruby": [
        [
          "三連単",
          "さんれんたん"
        ]
      ],
      "word": "三連単"
    }
  ],
  "forms": [
    {
      "form": "三連複",
      "ruby": [
        [
          "三",
          "さん"
        ],
        [
          "連",
          "れん"
        ],
        [
          "複",
          "ぷく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "sanrenpuku",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "さんれんぷく",
      "roman": "sanrenpuku",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "さんれんぷく",
        "hhira": "さんれんぷく"
      },
      "expansion": "三(さん)連(れん)複(ぷく) • (sanrenpuku) ^(←さんれんぷく (sanrenpuku)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with fifth grade kanji",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with three Han script characters",
        "ja:Horse racing"
      ],
      "glosses": [
        "betting on the first 3 winning horses, in any order"
      ],
      "links": [
        [
          "horse racing",
          "horse racing"
        ],
        [
          "betting",
          "betting"
        ]
      ],
      "raw_glosses": [
        "(horse racing) betting on the first 3 winning horses, in any order"
      ],
      "topics": [
        "hobbies",
        "horse-racing",
        "horseracing",
        "horses",
        "lifestyle",
        "pets",
        "racing",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[sã̠nɾẽ̞mpɯ̟ᵝkɯ̟ᵝ]"
    }
  ],
  "word": "三連複"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "三連複"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "三連複",
  "trace": "started on line 2, detected on line 2"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "三連複"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "三連複",
  "trace": ""
}