"riffing" meaning in English

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  "lang_code": "en",
  "pos": "verb",
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        "present participle and gerund of riff"
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        "present participle and gerund of rif"
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  "word": "riffing"
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      "form": "riffings",
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  "lang_code": "en",
  "pos": "noun",
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        {
          "ref": "2008, Ross Posnock, Philip Roth's Rude Truth: The Art of Immaturity, page 42:",
          "text": "Both novels are inventive riffings upon classic American authors, including Hawthorne, Melville, […]",
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        "The act of one who riffs; an improvisation."
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  "word": "riffing"
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  "lang_code": "en",
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  "word": "riffing"
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          "text": "Both novels are inventive riffings upon classic American authors, including Hawthorne, Melville, […]",
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      ],
      "glosses": [
        "The act of one who riffs; an improvisation."
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