"pace car" meaning in English

{
  "forms": [
    {
      "form": "pace cars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pace car (plural pace cars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Motor racing",
          "orig": "en:Motor racing",
          "parents": [
            "Automotive",
            "Sports",
            "Transport",
            "Human activity",
            "All topics",
            "Human behaviour",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A car that other cars drive behind before a race starts."
      ],
      "id": "en-pace_car-en-noun-WH2Oct0T",
      "links": [
        [
          "motor racing",
          "motor racing"
        ],
        [
          "car",
          "car"
        ]
      ],
      "raw_glosses": [
        "(motor racing) A car that other cars drive behind before a race starts."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ],
      "translations": [
        {
          "_dis1": "77 23",
          "code": "fi",
          "lang": "Finnish",
          "sense": "car that others drive behind before race start",
          "word": "lähtöauto"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Motor racing",
          "orig": "en:Motor racing",
          "parents": [
            "Automotive",
            "Sports",
            "Transport",
            "Human activity",
            "All topics",
            "Human behaviour",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        },
        {
          "_dis": "27 73",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "31 69",
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "24 76",
          "kind": "other",
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        },
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          "_dis": "24 76",
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          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "32 68",
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A car that paces the race cars to keep them running at a slower pace due to race conditions, and which the other cars cannot pass."
      ],
      "id": "en-pace_car-en-noun-MjAeYBUm",
      "links": [
        [
          "motor racing",
          "motor racing"
        ]
      ],
      "raw_glosses": [
        "(motor racing) A car that paces the race cars to keep them running at a slower pace due to race conditions, and which the other cars cannot pass."
      ],
      "related": [
        {
          "_dis1": "35 65",
          "tags": [
            "English",
            "European"
          ],
          "word": "safety car"
        }
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ]
    }
  ],
  "word": "pace car"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Entries with translation boxes",
    "Pages with 1 entry",
    "Pages with entries",
    "Terms with Finnish translations"
  ],
  "forms": [
    {
      "form": "pace cars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pace car (plural pace cars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "tags": [
        "English",
        "European"
      ],
      "word": "safety car"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Motor racing"
      ],
      "glosses": [
        "A car that other cars drive behind before a race starts."
      ],
      "links": [
        [
          "motor racing",
          "motor racing"
        ],
        [
          "car",
          "car"
        ]
      ],
      "raw_glosses": [
        "(motor racing) A car that other cars drive behind before a race starts."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ]
    },
    {
      "categories": [
        "en:Motor racing"
      ],
      "glosses": [
        "A car that paces the race cars to keep them running at a slower pace due to race conditions, and which the other cars cannot pass."
      ],
      "links": [
        [
          "motor racing",
          "motor racing"
        ]
      ],
      "raw_glosses": [
        "(motor racing) A car that paces the race cars to keep them running at a slower pace due to race conditions, and which the other cars cannot pass."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "car that others drive behind before race start",
      "word": "lähtöauto"
    }
  ],
  "word": "pace car"
}