"tower bastion" meaning in English

{
  "forms": [
    {
      "form": "tower bastions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "tower bastion (plural tower bastions)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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      ],
      "glosses": [
        "A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works."
      ],
      "id": "en-tower_bastion-en-noun-f9Ej~bEs",
      "links": [
        [
          "bastion",
          "bastion"
        ],
        [
          "masonry",
          "masonry"
        ],
        [
          "chamber",
          "chamber"
        ]
      ],
      "raw_glosses": [
        "(fortifications) A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works."
      ],
      "topics": [
        "fortifications",
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "tower bastion"
}

{
  "forms": [
    {
      "form": "tower bastions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tower bastion (plural tower bastions)",
      "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",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works."
      ],
      "links": [
        [
          "bastion",
          "bastion"
        ],
        [
          "masonry",
          "masonry"
        ],
        [
          "chamber",
          "chamber"
        ]
      ],
      "raw_glosses": [
        "(fortifications) A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works."
      ],
      "topics": [
        "fortifications",
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "tower bastion"
}