"census tract" meaning in English

{
  "forms": [
    {
      "form": "census tracts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "census tract (plural census tracts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Demography",
          "orig": "en:Demography",
          "parents": [
            "Sciences",
            "Statistics",
            "All topics",
            "Formal sciences",
            "Mathematics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A subdivision of a county or township, used by the United States Census Bureau for statistical purposes."
      ],
      "id": "en-census_tract-en-noun-aNIwrFlT",
      "links": [
        [
          "subdivision",
          "subdivision"
        ],
        [
          "county",
          "county"
        ],
        [
          "township",
          "township"
        ]
      ],
      "raw_glosses": [
        "(US) A subdivision of a county or township, used by the United States Census Bureau for statistical purposes."
      ],
      "related": [
        {
          "word": "census-designated place"
        },
        {
          "word": "census area"
        }
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "census tract"
}

{
  "forms": [
    {
      "form": "census tracts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "census tract (plural census tracts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "census-designated place"
    },
    {
      "word": "census area"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Demography"
      ],
      "glosses": [
        "A subdivision of a county or township, used by the United States Census Bureau for statistical purposes."
      ],
      "links": [
        [
          "subdivision",
          "subdivision"
        ],
        [
          "county",
          "county"
        ],
        [
          "township",
          "township"
        ]
      ],
      "raw_glosses": [
        "(US) A subdivision of a county or township, used by the United States Census Bureau for statistical purposes."
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "census tract"
}