"correspondence course" meaning in All languages combined

{
  "forms": [
    {
      "form": "correspondence courses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "correspondence course (plural correspondence 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": "topical",
          "langcode": "en",
          "name": "Education",
          "orig": "en:Education",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A study programme that is carried on by post, with tutors mailing learning materials and assignments to students, and students mailing back their work."
      ],
      "id": "en-correspondence_course-en-noun-ZVX9y-AG"
    }
  ],
  "word": "correspondence course"
}

{
  "forms": [
    {
      "form": "correspondence courses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "correspondence course (plural correspondence courses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Education"
      ],
      "glosses": [
        "A study programme that is carried on by post, with tutors mailing learning materials and assignments to students, and students mailing back their work."
      ]
    }
  ],
  "word": "correspondence course"
}