"backmarker" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "back",
        "3": "marker"
      },
      "expansion": "back + marker",
      "name": "compound"
    }
  ],
  "etymology_text": "back + marker",
  "forms": [
    {
      "form": "backmarkers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backmarker (plural backmarkers)",
      "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": "topical",
          "langcode": "en",
          "name": "Motor racing",
          "orig": "en:Motor racing",
          "parents": [
            "Automotive",
            "Sports",
            "Transport",
            "Human activity",
            "All topics",
            "Human behaviour",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A racer who holds a poor rank or is lapped in a race."
      ],
      "id": "en-backmarker-en-noun-kFQehOhj",
      "links": [
        [
          "racer",
          "racer"
        ],
        [
          "lapped",
          "lapped"
        ],
        [
          "race",
          "race"
        ]
      ],
      "synonyms": [
        {
          "word": "straggler"
        },
        {
          "word": "back marker"
        }
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "straggler",
          "tags": [
            "masculine"
          ],
          "word": "Nachzügler"
        }
      ]
    }
  ],
  "word": "backmarker"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "back",
        "3": "marker"
      },
      "expansion": "back + marker",
      "name": "compound"
    }
  ],
  "etymology_text": "back + marker",
  "forms": [
    {
      "form": "backmarkers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backmarker (plural backmarkers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "en:Motor racing",
        "en:People"
      ],
      "glosses": [
        "A racer who holds a poor rank or is lapped in a race."
      ],
      "links": [
        [
          "racer",
          "racer"
        ],
        [
          "lapped",
          "lapped"
        ],
        [
          "race",
          "race"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "straggler"
    },
    {
      "word": "back marker"
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "straggler",
      "tags": [
        "masculine"
      ],
      "word": "Nachzügler"
    }
  ],
  "word": "backmarker"
}