"runners and riders" meaning in English

{
  "etymology_text": "From horse racing, the horses and the jockeys.",
  "head_templates": [
    {
      "args": {
        "1": "p"
      },
      "expansion": "runners and riders pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English coordinated pairs",
          "parents": [
            "Coordinated pairs",
            "Terms by etymology"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "15 December 2019, Jamie Grierson, Heather Stewart, “Labour leadership contest: who are the runners and riders?”, in The Guardian:",
          "text": "Labour leadership contest: who are the runners and riders?",
          "type": "quote"
        }
      ],
      "glosses": [
        "The candidates in a competition or leadership contest."
      ],
      "id": "en-runners_and_riders-en-noun-QTqNcvQT",
      "links": [
        [
          "humorous",
          "humorous"
        ]
      ],
      "raw_glosses": [
        "(humorous, idiomatic) The candidates in a competition or leadership contest."
      ],
      "tags": [
        "humorous",
        "idiomatic",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "runners and riders"
}

{
  "etymology_text": "From horse racing, the horses and the jockeys.",
  "head_templates": [
    {
      "args": {
        "1": "p"
      },
      "expansion": "runners and riders pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English coordinated pairs",
        "English entries with incorrect language header",
        "English humorous terms",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English pluralia tantum",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "15 December 2019, Jamie Grierson, Heather Stewart, “Labour leadership contest: who are the runners and riders?”, in The Guardian:",
          "text": "Labour leadership contest: who are the runners and riders?",
          "type": "quote"
        }
      ],
      "glosses": [
        "The candidates in a competition or leadership contest."
      ],
      "links": [
        [
          "humorous",
          "humorous"
        ]
      ],
      "raw_glosses": [
        "(humorous, idiomatic) The candidates in a competition or leadership contest."
      ],
      "tags": [
        "humorous",
        "idiomatic",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "runners and riders"
}