"subset classifier" meaning in English

{
  "forms": [
    {
      "form": "subset classifiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subset classifier (plural subset classifiers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A set which serves as the codomain of a characteristic function."
      ],
      "id": "en-subset_classifier-en-noun-bC9HgDOZ",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "codomain",
          "codomain"
        ],
        [
          "characteristic function",
          "characteristic function"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A set which serves as the codomain of a characteristic function."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Category theory",
          "orig": "en:Category theory",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The subobject classifier restricted to the category Set."
      ],
      "id": "en-subset_classifier-en-noun-pxWsoCSg",
      "links": [
        [
          "category theory",
          "category theory"
        ],
        [
          "subobject classifier",
          "subobject classifier"
        ],
        [
          "restrict",
          "restrict"
        ]
      ],
      "raw_glosses": [
        "(category theory, uncountable) The subobject classifier restricted to the category Set."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "category-theory",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "subset classifier"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "subset classifiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subset classifier (plural subset classifiers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Mathematics"
      ],
      "glosses": [
        "A set which serves as the codomain of a characteristic function."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "codomain",
          "codomain"
        ],
        [
          "characteristic function",
          "characteristic function"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A set which serves as the codomain of a characteristic function."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    },
    {
      "categories": [
        "English uncountable nouns",
        "en:Category theory"
      ],
      "glosses": [
        "The subobject classifier restricted to the category Set."
      ],
      "links": [
        [
          "category theory",
          "category theory"
        ],
        [
          "subobject classifier",
          "subobject classifier"
        ],
        [
          "restrict",
          "restrict"
        ]
      ],
      "raw_glosses": [
        "(category theory, uncountable) The subobject classifier restricted to the category Set."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "category-theory",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "subset classifier"
}