"cost function" meaning in All languages combined

{
  "forms": [
    {
      "form": "cost functions",
      "tags": [
        "plural"
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  "head_templates": [
    {
      "args": {},
      "expansion": "cost function (plural cost functions)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "langcode": "en",
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          "orig": "en:Functions",
          "parents": [
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            "Calculus",
            "Geometry",
            "Mathematical analysis",
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            "Formal sciences",
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          "source": "w"
        }
      ],
      "glosses": [
        "Any mathematical relationship between an activity and its cost."
      ],
      "id": "en-cost_function-en-noun-ahWYugzr",
      "links": [
        [
          "mathematical",
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        [
          "relationship",
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        [
          "activity",
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        ]
      ],
      "related": [
        {
          "word": "fixed cost"
        },
        {
          "word": "loss function"
        },
        {
          "word": "objective function"
        },
        {
          "word": "unit cost"
        },
        {
          "word": "variable cost"
        }
      ]
    }
  ],
  "word": "cost function"
}

{
  "forms": [
    {
      "form": "cost functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cost function (plural cost functions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "fixed cost"
    },
    {
      "word": "loss function"
    },
    {
      "word": "objective function"
    },
    {
      "word": "unit cost"
    },
    {
      "word": "variable cost"
    }
  ],
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      "glosses": [
        "Any mathematical relationship between an activity and its cost."
      ],
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          "relationship",
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  "word": "cost function"
}