"dead letter office" meaning in English

{
  "forms": [
    {
      "form": "dead letter offices",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "dead letter office"
      },
      "expansion": "dead letter office (plural dead letter offices)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "56 44",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "58 42",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "59 41",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The postal facility that deals with mail that cannot be delivered."
      ],
      "id": "en-dead_letter_office-en-noun-SsnUT1X0",
      "links": [
        [
          "postal",
          "postal"
        ],
        [
          "facility",
          "facility"
        ],
        [
          "mail",
          "mail"
        ],
        [
          "deliver",
          "deliver"
        ]
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "bold_text_offsets": [
            [
              21,
              39
            ]
          ],
          "ref": "2009, Mike Hockney, The Last Bling King, Lulu Press, →ISBN, page 101:",
          "text": "The whole world is a Dead Letter Office. No one's listening to us. Our words vanish in the wind.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              40,
              58
            ]
          ],
          "ref": "1890 April 19, “Farm Topics”, in The Leader: A Weekly Journal of News, Politics, Agriculture, Literature, Science and Sport, Melbourne, Victoria, page 10:",
          "text": "The agriculture department was merely a dead letter office until the present Minister gave it life and usefulness",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A channel of communications for which the recipient neither acknowledges nor acts upon any messages sent."
      ],
      "id": "en-dead_letter_office-en-noun-qIiiR~fG",
      "raw_glosses": [
        "(figurative) A channel of communications for which the recipient neither acknowledges nor acts upon any messages sent."
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "dead letter office"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "dead letter offices",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "dead letter office"
      },
      "expansion": "dead letter office (plural dead letter offices)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The postal facility that deals with mail that cannot be delivered."
      ],
      "links": [
        [
          "postal",
          "postal"
        ],
        [
          "facility",
          "facility"
        ],
        [
          "mail",
          "mail"
        ],
        [
          "deliver",
          "deliver"
        ]
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              21,
              39
            ]
          ],
          "ref": "2009, Mike Hockney, The Last Bling King, Lulu Press, →ISBN, page 101:",
          "text": "The whole world is a Dead Letter Office. No one's listening to us. Our words vanish in the wind.",
          "type": "quotation"
        },
        {
          "bold_text_offsets": [
            [
              40,
              58
            ]
          ],
          "ref": "1890 April 19, “Farm Topics”, in The Leader: A Weekly Journal of News, Politics, Agriculture, Literature, Science and Sport, Melbourne, Victoria, page 10:",
          "text": "The agriculture department was merely a dead letter office until the present Minister gave it life and usefulness",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A channel of communications for which the recipient neither acknowledges nor acts upon any messages sent."
      ],
      "raw_glosses": [
        "(figurative) A channel of communications for which the recipient neither acknowledges nor acts upon any messages sent."
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "dead letter office"
}