"mountainbike" meaning in English

{
  "forms": [
    {
      "form": "mountainbikes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mountainbike (plural mountainbikes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "mountain bike"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              139,
              151
            ]
          ],
          "ref": "2013 January 25, “Farm Jam tipped to be bigger than ever”, in Stuff:",
          "text": "Lacondeguy and Czech rider Tomas Zejda will take on New Zealand's Kelly McGarry and reigning champion Conor Macfarlane in a battle for the mountainbike crown.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of mountain bike."
      ],
      "id": "en-mountainbike-en-noun-WCHeaJfY",
      "links": [
        [
          "mountain bike",
          "mountain bike#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "mountainbike"
}

{
  "forms": [
    {
      "form": "mountainbikes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mountainbike (plural mountainbikes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "mountain bike"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "Pages with 4 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              139,
              151
            ]
          ],
          "ref": "2013 January 25, “Farm Jam tipped to be bigger than ever”, in Stuff:",
          "text": "Lacondeguy and Czech rider Tomas Zejda will take on New Zealand's Kelly McGarry and reigning champion Conor Macfarlane in a battle for the mountainbike crown.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of mountain bike."
      ],
      "links": [
        [
          "mountain bike",
          "mountain bike#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "mountainbike"
}