"boot knife" meaning in English

{
  "forms": [
    {
      "form": "boot knives",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "boot knives"
      },
      "expansion": "boot knife (plural boot knives)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Footwear",
          "orig": "en:Footwear",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Weapons",
          "orig": "en:Weapons",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "neck knife"
        },
        {
          "word": "pocket knife"
        }
      ],
      "glosses": [
        "A knife, usually with a fixed double-edged blade, that is carried inside a sheath or attached to a boot."
      ],
      "id": "en-boot_knife-en-noun-ttKMXVwj",
      "links": [
        [
          "knife",
          "knife"
        ],
        [
          "blade",
          "blade"
        ]
      ]
    }
  ],
  "word": "boot knife"
}

{
  "forms": [
    {
      "form": "boot knives",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "boot knives"
      },
      "expansion": "boot knife (plural boot knives)",
      "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",
        "en:Footwear",
        "en:Weapons"
      ],
      "coordinate_terms": [
        {
          "word": "neck knife"
        },
        {
          "word": "pocket knife"
        }
      ],
      "glosses": [
        "A knife, usually with a fixed double-edged blade, that is carried inside a sheath or attached to a boot."
      ],
      "links": [
        [
          "knife",
          "knife"
        ],
        [
          "blade",
          "blade"
        ]
      ]
    }
  ],
  "word": "boot knife"
}