"marginal cost" meaning in English

{
  "forms": [
    {
      "form": "marginal costs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "marginal cost (plural marginal costs)",
      "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": "Economics",
          "orig": "en:Economics",
          "parents": [
            "Social sciences",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "marginal cost of capital"
        }
      ],
      "glosses": [
        "The increase in cost that accompanies a unit increase in output; the partial derivative of the cost function with respect to output."
      ],
      "id": "en-marginal_cost-en-noun-4JYQZ3WP",
      "links": [
        [
          "economics",
          "economics"
        ]
      ],
      "raw_glosses": [
        "(economics) The increase in cost that accompanies a unit increase in output; the partial derivative of the cost function with respect to output."
      ],
      "topics": [
        "economics",
        "science",
        "sciences"
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "additional unit production cost",
          "tags": [
            "masculine",
            "plural"
          ],
          "word": "mezní náklady"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "additional unit production cost",
          "word": "rajakustannus"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "additional unit production cost",
          "word": "marginaalikustannus"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "additional unit production cost",
          "tags": [
            "masculine"
          ],
          "word": "coût marginal"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "additional unit production cost",
          "word": "határköltség"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "predélʹnyje izdéržki",
          "sense": "additional unit production cost",
          "tags": [
            "plural"
          ],
          "word": "преде́льные изде́ржки"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "additional unit production cost",
          "word": "karagdagang halaga"
        }
      ]
    }
  ],
  "word": "marginal cost"
}

{
  "derived": [
    {
      "word": "marginal cost of capital"
    }
  ],
  "forms": [
    {
      "form": "marginal costs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "marginal cost (plural marginal costs)",
      "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:Economics"
      ],
      "glosses": [
        "The increase in cost that accompanies a unit increase in output; the partial derivative of the cost function with respect to output."
      ],
      "links": [
        [
          "economics",
          "economics"
        ]
      ],
      "raw_glosses": [
        "(economics) The increase in cost that accompanies a unit increase in output; the partial derivative of the cost function with respect to output."
      ],
      "topics": [
        "economics",
        "science",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "additional unit production cost",
      "tags": [
        "masculine",
        "plural"
      ],
      "word": "mezní náklady"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "additional unit production cost",
      "word": "rajakustannus"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "additional unit production cost",
      "word": "marginaalikustannus"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "additional unit production cost",
      "tags": [
        "masculine"
      ],
      "word": "coût marginal"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "additional unit production cost",
      "word": "határköltség"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "predélʹnyje izdéržki",
      "sense": "additional unit production cost",
      "tags": [
        "plural"
      ],
      "word": "преде́льные изде́ржки"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "additional unit production cost",
      "word": "karagdagang halaga"
    }
  ],
  "word": "marginal cost"
}