"blue straggler" meaning in English

{
  "forms": [
    {
      "form": "blue stragglers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue straggler (plural blue stragglers)",
      "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": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Stars",
          "orig": "en:Stars",
          "parents": [
            "Celestial bodies",
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2015, David Stevenson, The Complex Lives of Star Clusters, Springer, page 168",
          "text": "This boosted the mass of the companion, turning it into a blue straggler, while reducing the companion to a sub-dwarf B star.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An unusually hot and blue star in globular clusters."
      ],
      "id": "en-blue_straggler-en-noun-rG778iCw",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "star",
          "star"
        ],
        [
          "globular cluster",
          "globular cluster"
        ]
      ],
      "raw_glosses": [
        "(astronomy) An unusually hot and blue star in globular clusters."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "ar",
          "lang": "Arabic",
          "sense": "unusually hot and blue star",
          "tags": [
            "masculine"
          ],
          "word": "نجوم زرقاء شاردَة"
        },
        {
          "code": "ca",
          "lang": "Catalan",
          "sense": "unusually hot and blue star",
          "tags": [
            "feminine"
          ],
          "word": "estrella endarrerida blava"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "unusually hot and blue star",
          "tags": [
            "masculine"
          ],
          "word": "Blaue Nachzügler"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "unusually hot and blue star",
          "word": "blå etterslenger"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "unusually hot and blue star",
          "word": "blå etternølar"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "unusually hot and blue star",
          "tags": [
            "feminine"
          ],
          "word": "estrella rezagada azul"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "unusually hot and blue star",
          "word": "blå eftersläntrar"
        },
        {
          "code": "tr",
          "lang": "Turkish",
          "sense": "unusually hot and blue star",
          "word": "mavi başıboş"
        }
      ],
      "wikipedia": [
        "blue straggler"
      ]
    }
  ],
  "word": "blue straggler"
}

{
  "forms": [
    {
      "form": "blue stragglers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue straggler (plural blue stragglers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Astronomy",
        "en:Stars"
      ],
      "examples": [
        {
          "ref": "2015, David Stevenson, The Complex Lives of Star Clusters, Springer, page 168",
          "text": "This boosted the mass of the companion, turning it into a blue straggler, while reducing the companion to a sub-dwarf B star.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An unusually hot and blue star in globular clusters."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "star",
          "star"
        ],
        [
          "globular cluster",
          "globular cluster"
        ]
      ],
      "raw_glosses": [
        "(astronomy) An unusually hot and blue star in globular clusters."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "blue straggler"
      ]
    }
  ],
  "translations": [
    {
      "code": "ar",
      "lang": "Arabic",
      "sense": "unusually hot and blue star",
      "tags": [
        "masculine"
      ],
      "word": "نجوم زرقاء شاردَة"
    },
    {
      "code": "ca",
      "lang": "Catalan",
      "sense": "unusually hot and blue star",
      "tags": [
        "feminine"
      ],
      "word": "estrella endarrerida blava"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "unusually hot and blue star",
      "tags": [
        "masculine"
      ],
      "word": "Blaue Nachzügler"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "unusually hot and blue star",
      "word": "blå etterslenger"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "unusually hot and blue star",
      "word": "blå etternølar"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "unusually hot and blue star",
      "tags": [
        "feminine"
      ],
      "word": "estrella rezagada azul"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "unusually hot and blue star",
      "word": "blå eftersläntrar"
    },
    {
      "code": "tr",
      "lang": "Turkish",
      "sense": "unusually hot and blue star",
      "word": "mavi başıboş"
    }
  ],
  "word": "blue straggler"
}