"complementary studies" meaning in English

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      "expansion": "complementary studies (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Education",
          "orig": "en:Education",
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            "Society",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "A subject teaching general skills and responsibilities such as teamwork and critical thinking."
      ],
      "id": "en-complementary_studies-en-noun-RkVfgcxM",
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          "education",
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          "subject",
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          "teamwork",
          "teamwork"
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        [
          "critical thinking",
          "critical thinking"
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        "(education) A subject teaching general skills and responsibilities such as teamwork and critical thinking."
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        "uncountable"
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      "topics": [
        "education"
      ]
    }
  ],
  "word": "complementary studies"
}

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A subject teaching general skills and responsibilities such as teamwork and critical thinking."
      ],
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        [
          "education",
          "education"
        ],
        [
          "subject",
          "subject"
        ],
        [
          "teamwork",
          "teamwork"
        ],
        [
          "critical thinking",
          "critical thinking"
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        "(education) A subject teaching general skills and responsibilities such as teamwork and critical thinking."
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      "topics": [
        "education"
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  "word": "complementary studies"
}