"X-pack" meaning in English

{
  "forms": [
    {
      "form": "X-packs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "X-pack (plural X-packs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "expansion pack"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Video games",
          "orig": "en:Video games",
          "parents": [
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of expansion pack."
      ],
      "id": "en-X-pack-en-noun-E7X9GLXN",
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "expansion pack",
          "expansion pack#English"
        ]
      ],
      "raw_glosses": [
        "(video games, informal) Abbreviation of expansion pack."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "informal"
      ],
      "topics": [
        "video-games"
      ]
    }
  ],
  "word": "X-pack"
}

{
  "forms": [
    {
      "form": "X-packs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "X-pack (plural X-packs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "expansion pack"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Video games"
      ],
      "glosses": [
        "Abbreviation of expansion pack."
      ],
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "expansion pack",
          "expansion pack#English"
        ]
      ],
      "raw_glosses": [
        "(video games, informal) Abbreviation of expansion pack."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "informal"
      ],
      "topics": [
        "video-games"
      ]
    }
  ],
  "word": "X-pack"
}