"closed city" meaning in English

{
  "forms": [
    {
      "form": "closed cities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "closed city (plural closed cities)",
      "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": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "Russia",
          "orig": "en:Russia",
          "parents": [
            "Asia",
            "Europe",
            "Earth",
            "Eurasia",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017 January 3, Douglas Preston, The Lost City of the Monkey God: A True Story, Grand Central Publishing, →ISBN:",
          "text": "[A] man with a gravelly, slow-talking, New Mexico drawl, Glassmire had built a career as a respected scientist who had worked as an engineer for Los Alamos National Laboratory in the mid-fifties, when Los Alamos was still a closed city.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Any of several settlements, especially in Russia, that have travel and residency restrictions, typically because they house sensitive nuclear or defense facilities."
      ],
      "id": "en-closed_city-en-noun-JTWbblsU",
      "links": [
        [
          "settlement",
          "settlement"
        ],
        [
          "Russia",
          "Russia"
        ],
        [
          "travel",
          "travel"
        ],
        [
          "residency",
          "residency"
        ],
        [
          "restriction",
          "restriction"
        ],
        [
          "sensitive",
          "sensitive"
        ],
        [
          "nuclear",
          "nuclear"
        ],
        [
          "defense",
          "defense"
        ]
      ],
      "translations": [
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "zakrýtyj górod",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "закры́тый го́род"
        }
      ],
      "wikipedia": [
        "closed city"
      ]
    }
  ],
  "word": "closed city"
}

{
  "forms": [
    {
      "form": "closed cities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "closed city (plural closed cities)",
      "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",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Russian translations",
        "Translation table header lacks gloss",
        "en:Russia"
      ],
      "examples": [
        {
          "ref": "2017 January 3, Douglas Preston, The Lost City of the Monkey God: A True Story, Grand Central Publishing, →ISBN:",
          "text": "[A] man with a gravelly, slow-talking, New Mexico drawl, Glassmire had built a career as a respected scientist who had worked as an engineer for Los Alamos National Laboratory in the mid-fifties, when Los Alamos was still a closed city.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Any of several settlements, especially in Russia, that have travel and residency restrictions, typically because they house sensitive nuclear or defense facilities."
      ],
      "links": [
        [
          "settlement",
          "settlement"
        ],
        [
          "Russia",
          "Russia"
        ],
        [
          "travel",
          "travel"
        ],
        [
          "residency",
          "residency"
        ],
        [
          "restriction",
          "restriction"
        ],
        [
          "sensitive",
          "sensitive"
        ],
        [
          "nuclear",
          "nuclear"
        ],
        [
          "defense",
          "defense"
        ]
      ],
      "wikipedia": [
        "closed city"
      ]
    }
  ],
  "translations": [
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "zakrýtyj górod",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "закры́тый го́род"
    }
  ],
  "word": "closed city"
}