"box number" meaning in English

{
  "etymology_text": "Literally, the number of a box into which mail for a particular recipient is placed.",
  "forms": [
    {
      "form": "box numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "box number (plural box numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Post",
          "orig": "en:Post",
          "parents": [
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "They didn't give me a proper address, only a box number."
        },
        {
          "text": "Would anyone with knowledge of the present whereabouts of Mrs Doris Miggins, formerly of Station Road, please contact Box No. 99, Puddletown Evening Gazette."
        }
      ],
      "glosses": [
        "A numerical address for postal correspondence, managed by a company or organisation on behalf of the addressee, and used e.g. for convenience, if one does not have a suitable physical address for receiving mail, or to avoid giving one's real address (e.g. in a newspaper advertisement)."
      ],
      "id": "en-box_number-en-noun-xk1M94UP",
      "synonyms": [
        {
          "tags": [
            "abbreviation",
            "common"
          ],
          "word": "box no."
        }
      ]
    }
  ],
  "word": "box number"
}

{
  "etymology_text": "Literally, the number of a box into which mail for a particular recipient is placed.",
  "forms": [
    {
      "form": "box numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "box number (plural box numbers)",
      "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",
        "en:Post"
      ],
      "examples": [
        {
          "text": "They didn't give me a proper address, only a box number."
        },
        {
          "text": "Would anyone with knowledge of the present whereabouts of Mrs Doris Miggins, formerly of Station Road, please contact Box No. 99, Puddletown Evening Gazette."
        }
      ],
      "glosses": [
        "A numerical address for postal correspondence, managed by a company or organisation on behalf of the addressee, and used e.g. for convenience, if one does not have a suitable physical address for receiving mail, or to avoid giving one's real address (e.g. in a newspaper advertisement)."
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "abbreviation",
        "common"
      ],
      "word": "box no."
    }
  ],
  "word": "box number"
}