"thunderflash" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thunder",
        "3": "flash"
      },
      "expansion": "thunder + flash",
      "name": "compound"
    }
  ],
  "etymology_text": "thunder + flash",
  "forms": [
    {
      "form": "thunderflashes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thunderflash (plural thunderflashes)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Military",
          "orig": "en:Military",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A pyrotechnic device that generates a loud noise, used to simulate battlefield conditions."
      ],
      "id": "en-thunderflash-en-noun-WLK87MpG",
      "links": [
        [
          "military",
          "military"
        ],
        [
          "pyrotechnic",
          "pyrotechnic"
        ],
        [
          "noise",
          "noise"
        ]
      ],
      "raw_glosses": [
        "(military) A pyrotechnic device that generates a loud noise, used to simulate battlefield conditions."
      ],
      "related": [
        {
          "word": "flash-bang"
        }
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "thunderflash"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thunder",
        "3": "flash"
      },
      "expansion": "thunder + flash",
      "name": "compound"
    }
  ],
  "etymology_text": "thunder + flash",
  "forms": [
    {
      "form": "thunderflashes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thunderflash (plural thunderflashes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "flash-bang"
    }
  ],
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        "en:Military"
      ],
      "glosses": [
        "A pyrotechnic device that generates a loud noise, used to simulate battlefield conditions."
      ],
      "links": [
        [
          "military",
          "military"
        ],
        [
          "pyrotechnic",
          "pyrotechnic"
        ],
        [
          "noise",
          "noise"
        ]
      ],
      "raw_glosses": [
        "(military) A pyrotechnic device that generates a loud noise, used to simulate battlefield conditions."
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "thunderflash"
}