"book packet" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "book packet",
      "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"
        }
      ],
      "glosses": [
        "A packet or parcel containing printed matter, especially one which may be sent through the mail at a reduced rate."
      ],
      "id": "en-book_packet-en-noun-sE2yR-3V",
      "links": [
        [
          "printed matter",
          "printed matter"
        ],
        [
          "mail",
          "mail"
        ],
        [
          "reduced",
          "reduced"
        ],
        [
          "rate",
          "rate"
        ]
      ],
      "raw_glosses": [
        "(dated, obsolete) A packet or parcel containing printed matter, especially one which may be sent through the mail at a reduced rate."
      ],
      "tags": [
        "dated",
        "obsolete"
      ]
    }
  ],
  "word": "book packet"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "book packet",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms with obsolete senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A packet or parcel containing printed matter, especially one which may be sent through the mail at a reduced rate."
      ],
      "links": [
        [
          "printed matter",
          "printed matter"
        ],
        [
          "mail",
          "mail"
        ],
        [
          "reduced",
          "reduced"
        ],
        [
          "rate",
          "rate"
        ]
      ],
      "raw_glosses": [
        "(dated, obsolete) A packet or parcel containing printed matter, especially one which may be sent through the mail at a reduced rate."
      ],
      "tags": [
        "dated",
        "obsolete"
      ]
    }
  ],
  "word": "book packet"
}