"fixed-gear bicycle" meaning in English

{
  "forms": [
    {
      "form": "fixed-gear bicycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fixed-gear bicycle (plural fixed-gear bicycles)",
      "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": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Bicycle types",
          "orig": "en:Bicycle types",
          "parents": [
            "Cycling",
            "Vehicles",
            "Transport",
            "Machines",
            "All topics",
            "Technology",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A bicycle that does not have a freewheel, and only has a single gear ratio."
      ],
      "id": "en-fixed-gear_bicycle-en-noun-b98h1Kic",
      "links": [
        [
          "freewheel",
          "freewheel"
        ],
        [
          "gear ratio",
          "gear ratio"
        ]
      ],
      "synonyms": [
        {
          "word": "fixie"
        }
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "biclycle without a freewheel",
          "tags": [
            "masculine"
          ],
          "word": "doortrapper"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "biclycle without a freewheel",
          "word": "fixipyörä"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "biclycle without a freewheel",
          "word": "fiksipyörä"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "biclycle without a freewheel",
          "word": "fiksi"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "biclycle without a freewheel",
          "word": "fixi"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "biclycle without a freewheel",
          "tags": [
            "masculine"
          ],
          "word": "vélo à pignon fixe"
        }
      ],
      "wikipedia": [
        "fixed-gear bicycle"
      ]
    }
  ],
  "word": "fixed-gear bicycle"
}

{
  "forms": [
    {
      "form": "fixed-gear bicycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fixed-gear bicycle (plural fixed-gear bicycles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Bicycle types"
      ],
      "glosses": [
        "A bicycle that does not have a freewheel, and only has a single gear ratio."
      ],
      "links": [
        [
          "freewheel",
          "freewheel"
        ],
        [
          "gear ratio",
          "gear ratio"
        ]
      ],
      "wikipedia": [
        "fixed-gear bicycle"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "fixie"
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "biclycle without a freewheel",
      "tags": [
        "masculine"
      ],
      "word": "doortrapper"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "biclycle without a freewheel",
      "word": "fixipyörä"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "biclycle without a freewheel",
      "word": "fiksipyörä"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "biclycle without a freewheel",
      "word": "fiksi"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "biclycle without a freewheel",
      "word": "fixi"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "biclycle without a freewheel",
      "tags": [
        "masculine"
      ],
      "word": "vélo à pignon fixe"
    }
  ],
  "word": "fixed-gear bicycle"
}