"race music" meaning in English

{
  "etymology_text": "In use from 1920, replaced by rhythm and blues in the 1940s.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "race music (uncountable)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Musical genres",
          "orig": "en:Musical genres",
          "parents": [
            "Genres",
            "Music",
            "Entertainment",
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2015, Deena Weinstein, Rock'n America: A Social and Cultural History, University of Toronto Press, →ISBN, page 29:",
          "text": "LA's most popular “race music” radio shows featured a white disc jockey, Hunter Hancock, from Texas. He featured black artists on his “Harlem Matinee,” which aired every afternoon starting at four.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Commercially recorded African-American popular music from the early 20th century, including blues and jazz."
      ],
      "id": "en-race_music-en-noun-GOzMNqn~",
      "links": [
        [
          "music",
          "music"
        ],
        [
          "African-American",
          "African-American"
        ],
        [
          "popular music",
          "popular music"
        ],
        [
          "blues",
          "blues"
        ],
        [
          "jazz",
          "jazz"
        ]
      ],
      "raw_glosses": [
        "(dated, music) Commercially recorded African-American popular music from the early 20th century, including blues and jazz."
      ],
      "tags": [
        "dated",
        "uncountable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "race music"
}

{
  "etymology_text": "In use from 1920, replaced by rhythm and blues in the 1940s.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "race music (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Musical genres"
      ],
      "examples": [
        {
          "ref": "2015, Deena Weinstein, Rock'n America: A Social and Cultural History, University of Toronto Press, →ISBN, page 29:",
          "text": "LA's most popular “race music” radio shows featured a white disc jockey, Hunter Hancock, from Texas. He featured black artists on his “Harlem Matinee,” which aired every afternoon starting at four.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Commercially recorded African-American popular music from the early 20th century, including blues and jazz."
      ],
      "links": [
        [
          "music",
          "music"
        ],
        [
          "African-American",
          "African-American"
        ],
        [
          "popular music",
          "popular music"
        ],
        [
          "blues",
          "blues"
        ],
        [
          "jazz",
          "jazz"
        ]
      ],
      "raw_glosses": [
        "(dated, music) Commercially recorded African-American popular music from the early 20th century, including blues and jazz."
      ],
      "tags": [
        "dated",
        "uncountable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "race music"
}