"swivel gun" meaning in English

{
  "forms": [
    {
      "form": "swivel guns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "swivel gun (plural swivel guns)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Artillery",
          "orig": "en:Artillery",
          "parents": [
            "Weapons",
            "Hunting",
            "Military",
            "Tools",
            "Human activity",
            "Society",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1881, Thomas Wilhelm, A Military Dictionary and Gazetteer",
          "text": "On this roof a heavy swivel-gun was to be placed to command shipping, while howitzers on each side were to form a flanking defense in connection with the neighboring towers.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A small cannon attached to a swivel or pivot. It was usually located on a ship's rail so it could have a large range of fire, and could fire anything ranging from small round balls of lead to cannon balls."
      ],
      "id": "en-swivel_gun-en-noun-n2Dl~QVp",
      "links": [
        [
          "cannon",
          "cannon"
        ],
        [
          "pivot",
          "pivot"
        ],
        [
          "lead",
          "lead"
        ],
        [
          "cannon ball",
          "cannon ball"
        ]
      ],
      "wikipedia": [
        "swivel gun"
      ]
    }
  ],
  "word": "swivel gun"
}

{
  "forms": [
    {
      "form": "swivel guns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "swivel gun (plural swivel guns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Artillery"
      ],
      "examples": [
        {
          "ref": "1881, Thomas Wilhelm, A Military Dictionary and Gazetteer",
          "text": "On this roof a heavy swivel-gun was to be placed to command shipping, while howitzers on each side were to form a flanking defense in connection with the neighboring towers.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A small cannon attached to a swivel or pivot. It was usually located on a ship's rail so it could have a large range of fire, and could fire anything ranging from small round balls of lead to cannon balls."
      ],
      "links": [
        [
          "cannon",
          "cannon"
        ],
        [
          "pivot",
          "pivot"
        ],
        [
          "lead",
          "lead"
        ],
        [
          "cannon ball",
          "cannon ball"
        ]
      ],
      "wikipedia": [
        "swivel gun"
      ]
    }
  ],
  "word": "swivel gun"
}