"書留郵便" meaning in Japanese

{
  "forms": [
    {
      "form": "書留郵便",
      "ruby": [
        [
          "書",
          "かき"
        ],
        [
          "留",
          "とめ"
        ],
        [
          "郵",
          "ゆう"
        ],
        [
          "便",
          "びん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kakitomeyūbin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かきとめゆうびん"
      },
      "expansion": "書(かき)留(とめ)郵(ゆう)便(びん) • (kakitomeyūbin)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "registered mail"
      ],
      "id": "en-書留郵便-ja-noun-TvAFviKL",
      "links": [
        [
          "registered mail",
          "registered mail"
        ]
      ]
    }
  ],
  "word": "書留郵便"
}

{
  "forms": [
    {
      "form": "書留郵便",
      "ruby": [
        [
          "書",
          "かき"
        ],
        [
          "留",
          "とめ"
        ],
        [
          "郵",
          "ゆう"
        ],
        [
          "便",
          "びん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kakitomeyūbin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かきとめゆうびん"
      },
      "expansion": "書(かき)留(とめ)郵(ゆう)便(びん) • (kakitomeyūbin)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with fifth grade kanji",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with four Han script characters"
      ],
      "glosses": [
        "registered mail"
      ],
      "links": [
        [
          "registered mail",
          "registered mail"
        ]
      ]
    }
  ],
  "word": "書留郵便"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "書留郵便"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "書留郵便",
  "trace": ""
}