"bicycle mail" meaning in English

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      "expansion": "bicycle mail (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Cycling",
          "orig": "en:Cycling",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Philately",
          "orig": "en:Philately",
          "parents": [
            "Hobbies",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Post",
          "orig": "en:Post",
          "parents": [
            "Communication",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "mail delivered by bicycle and identified by stamp and/or postal mark."
      ],
      "id": "en-bicycle_mail-en-noun-cqPHKEIB",
      "links": [
        [
          "mail",
          "mail"
        ],
        [
          "bicycle",
          "bicycle"
        ],
        [
          "stamp",
          "stamp"
        ],
        [
          "postal",
          "postal"
        ],
        [
          "mark",
          "mark"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "bicycle mail"
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      "expansion": "bicycle mail (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Cycling",
        "en:Philately",
        "en:Post"
      ],
      "glosses": [
        "mail delivered by bicycle and identified by stamp and/or postal mark."
      ],
      "links": [
        [
          "mail",
          "mail"
        ],
        [
          "bicycle",
          "bicycle"
        ],
        [
          "stamp",
          "stamp"
        ],
        [
          "postal",
          "postal"
        ],
        [
          "mark",
          "mark"
        ]
      ],
      "tags": [
        "uncountable"
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    }
  ],
  "word": "bicycle mail"
}