"tribool" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tri-",
        "3": "bool"
      },
      "expansion": "tri- + bool",
      "name": "affix"
    }
  ],
  "etymology_text": "From tri- + bool.",
  "forms": [
    {
      "form": "tribools",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tribool (plural tribools)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        {
          "kind": "other",
          "name": "English terms prefixed with tri-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Programming",
          "orig": "en:Programming",
          "parents": [
            "Computing",
            "Software engineering",
            "Technology",
            "Computer science",
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            "Media",
            "Fundamental",
            "Communication"
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          "source": "w"
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      ],
      "glosses": [
        "A variable that behaves similar to a Boolean, but allows three values instead of two."
      ],
      "id": "en-tribool-en-noun-3QcpAcRJ",
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "Boolean",
          "Boolean"
        ]
      ],
      "raw_glosses": [
        "(programming) A variable that behaves similar to a Boolean, but allows three values instead of two."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ]
    }
  ],
  "word": "tribool"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tri-",
        "3": "bool"
      },
      "expansion": "tri- + bool",
      "name": "affix"
    }
  ],
  "etymology_text": "From tri- + bool.",
  "forms": [
    {
      "form": "tribools",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tribool (plural tribools)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with tri-",
        "en:Programming"
      ],
      "glosses": [
        "A variable that behaves similar to a Boolean, but allows three values instead of two."
      ],
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "Boolean",
          "Boolean"
        ]
      ],
      "raw_glosses": [
        "(programming) A variable that behaves similar to a Boolean, but allows three values instead of two."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ]
    }
  ],
  "word": "tribool"
}