"gravel bicycle" meaning in English

{
  "forms": [
    {
      "form": "gravel bicycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "gravel bicycle (plural gravel bicycles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gravel bike"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Bicycle types",
          "orig": "en:Bicycle types",
          "parents": [
            "Cycling",
            "Vehicles",
            "Transport",
            "Machines",
            "All topics",
            "Technology",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Cycling",
          "orig": "en:Cycling",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of gravel bike"
      ],
      "id": "en-gravel_bicycle-en-noun-XHVNpkoW",
      "links": [
        [
          "cycling",
          "cycling#Noun"
        ],
        [
          "gravel bike",
          "gravel bike#English"
        ]
      ],
      "raw_glosses": [
        "(cycling) Alternative form of gravel bike"
      ],
      "tags": [
        "alt-of",
        "alternative"
      ],
      "topics": [
        "cycling",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "gravel bicycle"
}

{
  "forms": [
    {
      "form": "gravel bicycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "gravel bicycle (plural gravel bicycles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gravel bike"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Bicycle types",
        "en:Cycling"
      ],
      "glosses": [
        "Alternative form of gravel bike"
      ],
      "links": [
        [
          "cycling",
          "cycling#Noun"
        ],
        [
          "gravel bike",
          "gravel bike#English"
        ]
      ],
      "raw_glosses": [
        "(cycling) Alternative form of gravel bike"
      ],
      "tags": [
        "alt-of",
        "alternative"
      ],
      "topics": [
        "cycling",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "gravel bicycle"
}