"city wall" meaning in English

{
  "forms": [
    {
      "form": "city walls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "city wall (plural city walls)",
      "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": "Mandarin terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Walls and fences",
          "orig": "en:Walls and fences",
          "parents": [
            "Buildings and structures",
            "Architecture",
            "Applied sciences",
            "Art",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A wall around a city, built to define the city's boundaries, and sometimes to protect it from aggressors."
      ],
      "id": "en-city_wall-en-noun-rhhDlHgN",
      "links": [
        [
          "wall",
          "wall"
        ],
        [
          "aggressor",
          "aggressor"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) A wall around a city, built to define the city's boundaries, and sometimes to protect it from aggressors."
      ],
      "tags": [
        "plural-normally"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "a wall around a city",
          "word": "城牆"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "chéngqiáng",
          "sense": "a wall around a city",
          "word": "城墙"
        },
        {
          "code": "et",
          "lang": "Estonian",
          "sense": "a wall around a city",
          "word": "linnamüür"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "a wall around a city",
          "word": "kaupunginmuuri"
        },
        {
          "code": "ka",
          "lang": "Georgian",
          "roman": "galavani",
          "sense": "a wall around a city",
          "word": "გალავანი"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "a wall around a city",
          "tags": [
            "feminine"
          ],
          "word": "Stadtmauer"
        },
        {
          "code": "la",
          "lang": "Latin",
          "sense": "a wall around a city",
          "tags": [
            "neuter",
            "plural"
          ],
          "word": "moenia"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "a wall around a city",
          "tags": [
            "common-gender"
          ],
          "word": "stadsmur"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "a wall around a city",
          "tags": [
            "common-gender"
          ],
          "word": "ringmur"
        }
      ]
    }
  ],
  "word": "city wall"
}

{
  "forms": [
    {
      "form": "city walls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "city wall (plural city walls)",
      "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",
        "Mandarin terms with redundant transliterations",
        "en:Walls and fences"
      ],
      "glosses": [
        "A wall around a city, built to define the city's boundaries, and sometimes to protect it from aggressors."
      ],
      "links": [
        [
          "wall",
          "wall"
        ],
        [
          "aggressor",
          "aggressor"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) A wall around a city, built to define the city's boundaries, and sometimes to protect it from aggressors."
      ],
      "tags": [
        "plural-normally"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "a wall around a city",
      "word": "城牆"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "chéngqiáng",
      "sense": "a wall around a city",
      "word": "城墙"
    },
    {
      "code": "et",
      "lang": "Estonian",
      "sense": "a wall around a city",
      "word": "linnamüür"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "a wall around a city",
      "word": "kaupunginmuuri"
    },
    {
      "code": "ka",
      "lang": "Georgian",
      "roman": "galavani",
      "sense": "a wall around a city",
      "word": "გალავანი"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "a wall around a city",
      "tags": [
        "feminine"
      ],
      "word": "Stadtmauer"
    },
    {
      "code": "la",
      "lang": "Latin",
      "sense": "a wall around a city",
      "tags": [
        "neuter",
        "plural"
      ],
      "word": "moenia"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "a wall around a city",
      "tags": [
        "common-gender"
      ],
      "word": "stadsmur"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "a wall around a city",
      "tags": [
        "common-gender"
      ],
      "word": "ringmur"
    }
  ],
  "word": "city wall"
}