"user-defined function" meaning in English

{
  "forms": [
    {
      "form": "user-defined functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "user-defined function (plural user-defined functions)",
      "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"
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          "source": "w"
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          "kind": "topical",
          "langcode": "en",
          "name": "Computing",
          "orig": "en:Computing",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Functions",
          "orig": "en:Functions",
          "parents": [
            "Algebra",
            "Calculus",
            "Geometry",
            "Mathematical analysis",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters."
      ],
      "id": "en-user-defined_function-en-noun-smILuCjK",
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "program",
          "program"
        ],
        [
          "subroutine",
          "subroutine"
        ],
        [
          "value",
          "value"
        ],
        [
          "input",
          "input"
        ],
        [
          "parameter",
          "parameter"
        ]
      ],
      "raw_glosses": [
        "(computing) A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters."
      ],
      "related": [
        {
          "word": "predefined function"
        }
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "User Defined Function"
      ]
    }
  ],
  "word": "user-defined function"
}

{
  "forms": [
    {
      "form": "user-defined functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "user-defined function (plural user-defined functions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "predefined function"
    }
  ],
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
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        "en:Computing",
        "en:Functions"
      ],
      "glosses": [
        "A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters."
      ],
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "program",
          "program"
        ],
        [
          "subroutine",
          "subroutine"
        ],
        [
          "value",
          "value"
        ],
        [
          "input",
          "input"
        ],
        [
          "parameter",
          "parameter"
        ]
      ],
      "raw_glosses": [
        "(computing) A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "User Defined Function"
      ]
    }
  ],
  "word": "user-defined function"
}