"close harmony" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Musical genres",
          "orig": "en:Musical genres",
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            "Genres",
            "Music",
            "Entertainment",
            "Art",
            "Sound",
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      "glosses": [
        "A style of music where the chords are arranged within a narrow range, and the vocal styles of two or more singers either complement or are similar to each other."
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      "id": "en-close_harmony-en-noun-kx8LBTUD",
      "links": [
        [
          "music",
          "music"
        ],
        [
          "chords",
          "chords"
        ],
        [
          "singers",
          "singers"
        ],
        [
          "complement",
          "complement"
        ],
        [
          "similar",
          "similar"
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      "tags": [
        "uncountable"
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  "word": "close harmony"
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  "lang_code": "en",
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      ],
      "links": [
        [
          "music",
          "music"
        ],
        [
          "chords",
          "chords"
        ],
        [
          "singers",
          "singers"
        ],
        [
          "complement",
          "complement"
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          "similar",
          "similar"
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        "uncountable"
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  "word": "close harmony"
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