"extensional definition" meaning in English

{
  "forms": [
    {
      "form": "extensional definitions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "extensional definition (plural extensional definitions)",
      "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": "Semantics",
          "orig": "en:Semantics",
          "parents": [
            "Linguistics",
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A definition of a term that specifies its extension, that is, every object that falls under the definition."
      ],
      "id": "en-extensional_definition-en-noun-OBL7ptDP",
      "links": [
        [
          "semantics",
          "semantics"
        ],
        [
          "extension",
          "extension"
        ]
      ],
      "raw_glosses": [
        "(semantics) A definition of a term that specifies its extension, that is, every object that falls under the definition."
      ],
      "related": [
        {
          "word": "intensional definition"
        },
        {
          "word": "enumerative definition"
        }
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences",
        "semantics"
      ],
      "wikipedia": [
        "extensional definition"
      ]
    }
  ],
  "word": "extensional definition"
}

{
  "forms": [
    {
      "form": "extensional definitions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "extensional definition (plural extensional definitions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "intensional definition"
    },
    {
      "word": "enumerative definition"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Semantics"
      ],
      "glosses": [
        "A definition of a term that specifies its extension, that is, every object that falls under the definition."
      ],
      "links": [
        [
          "semantics",
          "semantics"
        ],
        [
          "extension",
          "extension"
        ]
      ],
      "raw_glosses": [
        "(semantics) A definition of a term that specifies its extension, that is, every object that falls under the definition."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences",
        "semantics"
      ],
      "wikipedia": [
        "extensional definition"
      ]
    }
  ],
  "word": "extensional definition"
}