"market horse" meaning in English

{
  "forms": [
    {
      "form": "market horses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "market horse (plural market horses)",
      "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": "lifeform",
          "langcode": "en",
          "name": "Horse racing",
          "orig": "en: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"
        }
      ],
      "examples": [
        {
          "ref": "1892, James Glass Bertram, A Mirror of the Turf, page 271",
          "text": "[N]othing is easier than to make sure […] that the horse selected, in the event of the public fancying him, shall be made a market horse, and be “milked” for the benefit of those interested: the losing of a race may at any time be ensured, and there are scores of “turf dairymen” who are reputed adepts in the use of the milking pail.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A horse kept in the betting-lists for the sole purpose of being betted against."
      ],
      "id": "en-market_horse-en-noun-hAM0uoY1",
      "links": [
        [
          "horse racing",
          "horse racing"
        ]
      ],
      "raw_glosses": [
        "(horse racing, slang, obsolete) A horse kept in the betting-lists for the sole purpose of being betted against."
      ],
      "tags": [
        "obsolete",
        "slang"
      ],
      "topics": [
        "hobbies",
        "horse-racing",
        "horseracing",
        "horses",
        "lifestyle",
        "pets",
        "racing",
        "sports"
      ]
    }
  ],
  "word": "market horse"
}

{
  "forms": [
    {
      "form": "market horses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "market horse (plural market horses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Horse racing"
      ],
      "examples": [
        {
          "ref": "1892, James Glass Bertram, A Mirror of the Turf, page 271",
          "text": "[N]othing is easier than to make sure […] that the horse selected, in the event of the public fancying him, shall be made a market horse, and be “milked” for the benefit of those interested: the losing of a race may at any time be ensured, and there are scores of “turf dairymen” who are reputed adepts in the use of the milking pail.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A horse kept in the betting-lists for the sole purpose of being betted against."
      ],
      "links": [
        [
          "horse racing",
          "horse racing"
        ]
      ],
      "raw_glosses": [
        "(horse racing, slang, obsolete) A horse kept in the betting-lists for the sole purpose of being betted against."
      ],
      "tags": [
        "obsolete",
        "slang"
      ],
      "topics": [
        "hobbies",
        "horse-racing",
        "horseracing",
        "horses",
        "lifestyle",
        "pets",
        "racing",
        "sports"
      ]
    }
  ],
  "word": "market horse"
}