"string bassist" meaning in English

{
  "forms": [
    {
      "form": "string bassists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "string bassist (plural string bassists)",
      "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"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "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"
        },
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          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A double bassist; someone who plays the string bass (double bass)."
      ],
      "id": "en-string_bassist-en-noun-XqhS9HIZ",
      "links": [
        [
          "double bassist",
          "double bassist"
        ],
        [
          "string bass",
          "string bass"
        ],
        [
          "double bass",
          "double bass"
        ]
      ]
    }
  ],
  "word": "string bassist"
}

{
  "forms": [
    {
      "form": "string bassists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "string bassist (plural string bassists)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Musicians",
        "en:People"
      ],
      "glosses": [
        "A double bassist; someone who plays the string bass (double bass)."
      ],
      "links": [
        [
          "double bassist",
          "double bassist"
        ],
        [
          "string bass",
          "string bass"
        ],
        [
          "double bass",
          "double bass"
        ]
      ]
    }
  ],
  "word": "string bassist"
}