"Ground Zero" meaning in English

{
  "etymology_text": "From the general term ground zero.",
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
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      "expansion": "Ground Zero",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Esperanto translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2010, George W. Bush, Decision Points, →ISBN, →OCLC, →OL, page 148:",
          "text": "As we approached Ground Zero, I felt like I was entering a nightmare. There was little light. Smoke hung in the air and mixed with suspended particles of debris, creating an eerie gray curtain. We sloshed through puddles left behind by the morning rain and the water used to fight the fires.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The site of the former World Trade Center towers in New York City destroyed on 11 September 2001."
      ],
      "id": "en-Ground_Zero-en-name-KZ65xihW",
      "links": [
        [
          "World Trade Center",
          "World Trade Center"
        ],
        [
          "New York City",
          "New York City"
        ]
      ],
      "translations": [
        {
          "code": "eo",
          "lang": "Esperanto",
          "sense": "site of former World Trade Center",
          "word": "Nultero"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "site of former World Trade Center",
          "tags": [
            "masculine",
            "neuter"
          ],
          "word": "Ground Zero"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "site of former World Trade Center",
          "tags": [
            "masculine"
          ],
          "word": "sitio del ex Centro Mundial Mercantil"
        }
      ]
    }
  ],
  "word": "Ground Zero"
}

{
  "etymology_text": "From the general term ground zero.",
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
      },
      "expansion": "Ground Zero",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Entries with translation boxes",
        "Pages with 2 entries",
        "Pages with entries",
        "Terms with Esperanto translations",
        "Terms with German translations",
        "Terms with Spanish translations"
      ],
      "examples": [
        {
          "ref": "2010, George W. Bush, Decision Points, →ISBN, →OCLC, →OL, page 148:",
          "text": "As we approached Ground Zero, I felt like I was entering a nightmare. There was little light. Smoke hung in the air and mixed with suspended particles of debris, creating an eerie gray curtain. We sloshed through puddles left behind by the morning rain and the water used to fight the fires.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The site of the former World Trade Center towers in New York City destroyed on 11 September 2001."
      ],
      "links": [
        [
          "World Trade Center",
          "World Trade Center"
        ],
        [
          "New York City",
          "New York City"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "eo",
      "lang": "Esperanto",
      "sense": "site of former World Trade Center",
      "word": "Nultero"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "site of former World Trade Center",
      "tags": [
        "masculine",
        "neuter"
      ],
      "word": "Ground Zero"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "site of former World Trade Center",
      "tags": [
        "masculine"
      ],
      "word": "sitio del ex Centro Mundial Mercantil"
    }
  ],
  "word": "Ground Zero"
}