"jam band" meaning in English

{
  "forms": [
    {
      "form": "jam bands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jam band (plural jam bands)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Collectives",
          "orig": "en:Collectives",
          "parents": [
            "Miscellaneous",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Music",
          "orig": "en:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Musicians",
          "orig": "en:Musicians",
          "parents": [
            "Music",
            "Occupations",
            "Art",
            "Sound",
            "People",
            "Work",
            "Culture",
            "Energy",
            "Human",
            "Human activity",
            "Society",
            "Nature",
            "All topics",
            "Human behaviour",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A type of band that plays any of several styles of country-influenced folk-rock and is associated with a particular subculture known for following said bands to shows, trading recordings of them and keeping their fandom alive."
      ],
      "id": "en-jam_band-en-noun-AOmivmyp",
      "links": [
        [
          "music",
          "music"
        ],
        [
          "band",
          "band"
        ],
        [
          "folk-rock",
          "folk-rock"
        ],
        [
          "subculture",
          "subculture"
        ]
      ],
      "raw_glosses": [
        "(music) A type of band that plays any of several styles of country-influenced folk-rock and is associated with a particular subculture known for following said bands to shows, trading recordings of them and keeping their fandom alive."
      ],
      "related": [
        {
          "word": "jam"
        },
        {
          "word": "jamming"
        },
        {
          "word": "jam out"
        },
        {
          "word": "jam session"
        }
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "jam band"
}

{
  "forms": [
    {
      "form": "jam bands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jam band (plural jam bands)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "jam"
    },
    {
      "word": "jamming"
    },
    {
      "word": "jam out"
    },
    {
      "word": "jam session"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
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        "en:Collectives",
        "en:Music",
        "en:Musicians"
      ],
      "glosses": [
        "A type of band that plays any of several styles of country-influenced folk-rock and is associated with a particular subculture known for following said bands to shows, trading recordings of them and keeping their fandom alive."
      ],
      "links": [
        [
          "music",
          "music"
        ],
        [
          "band",
          "band"
        ],
        [
          "folk-rock",
          "folk-rock"
        ],
        [
          "subculture",
          "subculture"
        ]
      ],
      "raw_glosses": [
        "(music) A type of band that plays any of several styles of country-influenced folk-rock and is associated with a particular subculture known for following said bands to shows, trading recordings of them and keeping their fandom alive."
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "jam band"
}