"subfunction" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "function"
      },
      "expansion": "sub- + function",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + function",
  "forms": [
    {
      "form": "subfunctions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subfunction (plural subfunctions)",
      "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": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2009 May 13, Ginia Bellafante, “Where It’s 1977 and 2007 All at the Same Time”, in New York Times",
          "text": "“Lost” is certainly to be granted its points for its subfunction as a soap opera this season.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A secondary or subsidiary function."
      ],
      "id": "en-subfunction-en-noun-ixKh2yZB",
      "links": [
        [
          "secondary",
          "secondary"
        ],
        [
          "subsidiary",
          "subsidiary"
        ],
        [
          "function",
          "function"
        ]
      ]
    }
  ],
  "word": "subfunction"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "function"
      },
      "expansion": "sub- + function",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + function",
  "forms": [
    {
      "form": "subfunctions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subfunction (plural subfunctions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with sub-",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2009 May 13, Ginia Bellafante, “Where It’s 1977 and 2007 All at the Same Time”, in New York Times",
          "text": "“Lost” is certainly to be granted its points for its subfunction as a soap opera this season.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A secondary or subsidiary function."
      ],
      "links": [
        [
          "secondary",
          "secondary"
        ],
        [
          "subsidiary",
          "subsidiary"
        ],
        [
          "function",
          "function"
        ]
      ]
    }
  ],
  "word": "subfunction"
}