"unreachable code" meaning in English

{
  "head_templates": [
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      "args": {
        "1": "-"
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      "expansion": "unreachable code (uncountable)",
      "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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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computing",
          "orig": "en:Computing",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "code that can never be reached during program execution because no part of the program calls it or branches to it."
      ],
      "id": "en-unreachable_code-en-noun-ijeGfj8z",
      "links": [
        [
          "computing",
          "computing#Noun"
        ]
      ],
      "raw_glosses": [
        "(computing) code that can never be reached during program execution because no part of the program calls it or branches to it."
      ],
      "synonyms": [
        {
          "word": "dead code"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "unerreichbarer Code"
        },
        {
          "code": "tr",
          "lang": "Turkish",
          "sense": "Translations",
          "word": "erişilmez kod"
        }
      ],
      "wikipedia": [
        "unreachable code"
      ]
    }
  ],
  "word": "unreachable code"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unreachable code (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Translation table header lacks gloss",
        "en:Computing"
      ],
      "glosses": [
        "code that can never be reached during program execution because no part of the program calls it or branches to it."
      ],
      "links": [
        [
          "computing",
          "computing#Noun"
        ]
      ],
      "raw_glosses": [
        "(computing) code that can never be reached during program execution because no part of the program calls it or branches to it."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "unreachable code"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "dead code"
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "unerreichbarer Code"
    },
    {
      "code": "tr",
      "lang": "Turkish",
      "sense": "Translations",
      "word": "erişilmez kod"
    }
  ],
  "word": "unreachable code"
}