"dead comet" meaning in English

{
  "forms": [
    {
      "form": "dead comets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead comet (plural dead comets)",
      "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"
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          "source": "w"
        },
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          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
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        },
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          "name": "Terms with Dutch translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A comet that has shed its volatiles after numerous passes around the sun."
      ],
      "id": "en-dead_comet-en-noun-vf~bMXjQ",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "comet",
          "comet"
        ],
        [
          "volatile",
          "volatile"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A comet that has shed its volatiles after numerous passes around the sun."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "dode komeet"
        }
      ]
    }
  ],
  "word": "dead comet"
}

{
  "forms": [
    {
      "form": "dead comets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead comet (plural dead comets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
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        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Dutch translations",
        "Translation table header lacks gloss",
        "en:Astronomy"
      ],
      "glosses": [
        "A comet that has shed its volatiles after numerous passes around the sun."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "comet",
          "comet"
        ],
        [
          "volatile",
          "volatile"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A comet that has shed its volatiles after numerous passes around the sun."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "dode komeet"
    }
  ],
  "word": "dead comet"
}