"40k" meaning in English

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        "2": "40",
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      "expansion": "40 + K",
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  "etymology_text": "40 + K. From 40,000, part of \"Warhammer 40,000\", referring to the future year where the game was set in.",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "topical",
          "langcode": "en",
          "name": "Board games",
          "orig": "en:Board games",
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          "name": "Science fiction",
          "orig": "en:Science fiction",
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          "kind": "topical",
          "langcode": "en",
          "name": "Warhammer",
          "orig": "en:Warhammer",
          "parents": [
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            "Fantasy",
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            "Tabletop games",
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            "Speculative fiction",
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      "glosses": [
        "Warhammer 40,000, a British tabletop military game set in a dystopian future Galaxy torn by war."
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        "(informal, slang, science fiction) Warhammer 40,000, a British tabletop military game set in a dystopian future Galaxy torn by war."
      ],
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        {
          "word": "Warhammer"
        }
      ],
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        "informal",
        "slang"
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        "literature",
        "media",
        "publishing",
        "science-fiction"
      ],
      "wikipedia": [
        "Warhammer 40,000"
      ]
    }
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    {
      "ipa": "/fɔːtiː keɪ/",
      "tags": [
        "UK"
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    {
      "ipa": "[ˈfɔːtʰi kʰeɪ]",
      "tags": [
        "UK"
      ]
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      "ipa": "/ˈfɔɹti keɪ/",
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        "General-American"
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      "ipa": "[ˈfɔɹɾi kʰeɪ]",
      "tags": [
        "General-American"
      ]
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    {
      "rhymes": "-eɪ"
    }
  ],
  "word": "40k"
}

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  "etymology_text": "40 + K. From 40,000, part of \"Warhammer 40,000\", referring to the future year where the game was set in.",
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  "lang_code": "en",
  "pos": "noun",
  "related": [
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      "word": "Warhammer"
    }
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      "glosses": [
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      ],
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        "(informal, slang, science fiction) Warhammer 40,000, a British tabletop military game set in a dystopian future Galaxy torn by war."
      ],
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        "UK"
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      "tags": [
        "General-American"
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    {
      "ipa": "[ˈfɔɹɾi kʰeɪ]",
      "tags": [
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  ],
  "word": "40k"
}