"\" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "跨語言符号",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "跨語言詞元",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "跨語言",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        ":Template:計算機 轉義字符的通常前綴。"
      ],
      "id": "zh-\\-mul-symbol-PdWuutMv"
    },
    {
      "glosses": [
        ":Template:計算機 用於部分操作系統（主要是微軟的）路径名称组件分隔符。"
      ],
      "id": "zh-\\-mul-symbol-sQah94OP"
    },
    {
      "glosses": [
        "（正则表达式） 匹配使用括号匹配的第n个标记的子表达式: ( )。"
      ],
      "id": "zh-\\-mul-symbol-3yrxWPLH"
    }
  ],
  "word": "\\"
}

{
  "categories": [
    "跨語言符号",
    "跨語言詞元"
  ],
  "lang": "跨語言",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        ":Template:計算機 轉義字符的通常前綴。"
      ]
    },
    {
      "glosses": [
        ":Template:計算機 用於部分操作系統（主要是微軟的）路径名称组件分隔符。"
      ]
    },
    {
      "glosses": [
        "（正则表达式） 匹配使用括号匹配的第n个标记的子表达式: ( )。"
      ]
    }
  ],
  "word": "\\"
}

{
  "called_from": "extractor/zh/page/parse_section/192",
  "msg": "Unhandled subtitle: 使用注意",
  "path": [
    "\\"
  ],
  "section": "跨語言",
  "subsection": "使用注意",
  "title": "\\",
  "trace": ""
}

{
  "called_from": "extractor/zh/page/parse_section/192",
  "msg": "Unhandled subtitle: 相關形式",
  "path": [
    "\\"
  ],
  "section": "跨語言",
  "subsection": "相關形式",
  "title": "\\",
  "trace": ""
}