"WW2" meaning in English

{
  "forms": [
    {
      "form": "WWII",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "proper noun"
      },
      "expansion": "WW2",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "World War II"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Historical events",
          "orig": "en:Historical events",
          "parents": [
            "History",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "History",
          "orig": "en:History",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "History of the United States",
          "orig": "en:History of the United States",
          "parents": [
            "United States",
            "History",
            "Countries",
            "Countries in North America",
            "All topics",
            "Polities",
            "Places",
            "North America",
            "Fundamental",
            "Names",
            "America",
            "Proper nouns",
            "Terms by semantic function",
            "Earth",
            "Nouns",
            "Nature",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Two",
          "orig": "en:Two",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Wars",
          "orig": "en:Wars",
          "parents": [
            "Historical events",
            "War",
            "History",
            "Conflict",
            "Military",
            "Violence",
            "All topics",
            "Human behaviour",
            "Society",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "World War II",
          "orig": "en:World War II",
          "parents": [
            "Historical events",
            "History of Europe",
            "War",
            "History",
            "Europe",
            "Conflict",
            "Military",
            "Violence",
            "All topics",
            "Earth",
            "Eurasia",
            "Human behaviour",
            "Society",
            "Fundamental",
            "Nature",
            "Human"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of World War II."
      ],
      "id": "en-WW2-en-name-m7zwfKps",
      "links": [
        [
          "World War II",
          "World War II#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "WW2"
}

{
  "forms": [
    {
      "form": "WWII",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "proper noun"
      },
      "expansion": "WW2",
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    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "World War II"
        }
      ],
      "categories": [
        "English abbreviations",
        "English entries with incorrect language header",
        "English lemmas",
        "English proper nouns",
        "English terms spelled with numbers",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Historical events",
        "en:History",
        "en:History of the United States",
        "en:Two",
        "en:Wars",
        "en:World War II"
      ],
      "glosses": [
        "Abbreviation of World War II."
      ],
      "links": [
        [
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          "World War II#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "WW2"
}