"doomsday bomb" meaning in English

{
  "forms": [
    {
      "form": "doomsday bombs",
      "tags": [
        "plural"
      ]
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  ],
  "head_templates": [
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      "expansion": "doomsday bomb (plural doomsday bombs)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "English entries with incorrect language header",
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        {
          "kind": "other",
          "langcode": "en",
          "name": "Nuclear warfare",
          "orig": "en:Nuclear warfare",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              4,
              17
            ]
          ],
          "text": "The doomsday bomb is terrifying. It puts all other nukes to shame.",
          "type": "example"
        }
      ],
      "glosses": [
        "A bomb capable of serving as a doomsday device."
      ],
      "id": "en-doomsday_bomb-en-noun-8XUYL3Ra",
      "links": [
        [
          "bomb",
          "bomb#Noun"
        ],
        [
          "doomsday device",
          "doomsday device"
        ]
      ]
    }
  ],
  "word": "doomsday bomb"
}

{
  "forms": [
    {
      "form": "doomsday bombs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "doomsday bomb (plural doomsday bombs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Nuclear warfare"
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      "examples": [
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              4,
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            ]
          ],
          "text": "The doomsday bomb is terrifying. It puts all other nukes to shame.",
          "type": "example"
        }
      ],
      "glosses": [
        "A bomb capable of serving as a doomsday device."
      ],
      "links": [
        [
          "bomb",
          "bomb#Noun"
        ],
        [
          "doomsday device",
          "doomsday device"
        ]
      ]
    }
  ],
  "word": "doomsday bomb"
}