"typechecker" meaning in English

{
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        "2": "type",
        "3": "checker"
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      "expansion": "type + checker",
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  ],
  "etymology_text": "From type + checker.",
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    {
      "form": "typecheckers",
      "tags": [
        "plural"
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      "expansion": "typechecker (plural typecheckers)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
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          "name": "Programming",
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      "examples": [
        {
          "ref": "2015 April 2, James Somers, “Toolkits for the Mind”, in MIT Technology Review:",
          "text": "The catch is that to get the full benefits of the type checker, the programmers have to add complex annotations to their code.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A system or algorithm that verifies values against their required data types, according to the type system of the language."
      ],
      "id": "en-typechecker-en-noun-LdBpVdeQ",
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        [
          "system",
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        [
          "algorithm",
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        [
          "verifies",
          "verify"
        ],
        [
          "value",
          "value"
        ],
        [
          "data type",
          "data type"
        ],
        [
          "type system",
          "type system"
        ]
      ],
      "raw_glosses": [
        "(programming) A system or algorithm that verifies values against their required data types, according to the type system of the language."
      ],
      "related": [
        {
          "tags": [
            "verb"
          ],
          "word": "typecheck"
        }
      ],
      "synonyms": [
        {
          "word": "type checker"
        }
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ]
    }
  ],
  "word": "typechecker"
}

{
  "etymology_templates": [
    {
      "args": {
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        "2": "type",
        "3": "checker"
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      "expansion": "type + checker",
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    }
  ],
  "etymology_text": "From type + checker.",
  "forms": [
    {
      "form": "typecheckers",
      "tags": [
        "plural"
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      "expansion": "typechecker (plural typecheckers)",
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  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "tags": [
        "verb"
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      "word": "typecheck"
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        "en:Programming"
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      "examples": [
        {
          "ref": "2015 April 2, James Somers, “Toolkits for the Mind”, in MIT Technology Review:",
          "text": "The catch is that to get the full benefits of the type checker, the programmers have to add complex annotations to their code.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A system or algorithm that verifies values against their required data types, according to the type system of the language."
      ],
      "links": [
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          "programming",
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          "data type",
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          "type system",
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      "raw_glosses": [
        "(programming) A system or algorithm that verifies values against their required data types, according to the type system of the language."
      ],
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        "computing",
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  "synonyms": [
    {
      "word": "type checker"
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  "word": "typechecker"
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