"core course" meaning in English

{
  "forms": [
    {
      "form": "core courses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "core course (plural core courses)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Education",
          "orig": "en:Education",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1934, The Balance Sheet - Volumes 16-17, page 113:",
          "text": "...their cooperation should be secured in order to include the subject as a core course in the program of studies.",
          "type": "quote"
        },
        {
          "ref": "1948, Earl James McGrath, Social Sciences in General Education, page 77:",
          "text": "What specifically is a core course? Over the answer to this advocates and the opponents of general education have waged bitter battles.",
          "type": "quote"
        },
        {
          "ref": "1993, CASCON '93: Software engineering, page 130:",
          "text": "As mentioned previously, this is a core course with a relatively large annual enrollment.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An academic class that is one of a subset of mandatory classes required to complete a degree program."
      ],
      "id": "en-core_course-en-noun-q28t1RvG",
      "links": [
        [
          "education",
          "education"
        ],
        [
          "class",
          "class"
        ]
      ],
      "raw_glosses": [
        "(education) An academic class that is one of a subset of mandatory classes required to complete a degree program."
      ],
      "related": [
        {
          "word": "core curriculum"
        }
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "word": "core course"
}

{
  "forms": [
    {
      "form": "core courses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "core course (plural core courses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "core curriculum"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "en:Education"
      ],
      "examples": [
        {
          "ref": "1934, The Balance Sheet - Volumes 16-17, page 113:",
          "text": "...their cooperation should be secured in order to include the subject as a core course in the program of studies.",
          "type": "quote"
        },
        {
          "ref": "1948, Earl James McGrath, Social Sciences in General Education, page 77:",
          "text": "What specifically is a core course? Over the answer to this advocates and the opponents of general education have waged bitter battles.",
          "type": "quote"
        },
        {
          "ref": "1993, CASCON '93: Software engineering, page 130:",
          "text": "As mentioned previously, this is a core course with a relatively large annual enrollment.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An academic class that is one of a subset of mandatory classes required to complete a degree program."
      ],
      "links": [
        [
          "education",
          "education"
        ],
        [
          "class",
          "class"
        ]
      ],
      "raw_glosses": [
        "(education) An academic class that is one of a subset of mandatory classes required to complete a degree program."
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "word": "core course"
}