"controlled vocabulary" meaning in English

{
  "forms": [
    {
      "form": "controlled vocabularies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "controlled vocabulary (plural controlled vocabularies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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": "Information science",
          "orig": "en:Information science",
          "parents": [
            "Applied sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A carefully selected set of terms – words and phrases – such that each concept from the domain of discourse is described using only one term in the set and each term in the set describes only one concept."
      ],
      "id": "en-controlled_vocabulary-en-noun-eXQXmRKl",
      "links": [
        [
          "information science",
          "information science"
        ],
        [
          "term",
          "term"
        ],
        [
          "concept",
          "concept"
        ],
        [
          "domain of discourse",
          "domain of discourse"
        ]
      ],
      "raw_glosses": [
        "(information science) A carefully selected set of terms – words and phrases – such that each concept from the domain of discourse is described using only one term in the set and each term in the set describes only one concept."
      ],
      "topics": [
        "computing",
        "engineering",
        "human-sciences",
        "information-science",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "carefully selected set of terms",
          "word": "受控詞表"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "shòukòng cíbiǎo",
          "sense": "carefully selected set of terms",
          "word": "受控词表"
        },
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "carefully selected set of terms",
          "tags": [
            "masculine"
          ],
          "word": "řízený slovník"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "carefully selected set of terms",
          "word": "kontrolloitu sanasto"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "carefully selected set of terms",
          "word": "supil na sansalitaan"
        }
      ],
      "wikipedia": [
        "controlled vocabulary"
      ]
    }
  ],
  "word": "controlled vocabulary"
}

{
  "forms": [
    {
      "form": "controlled vocabularies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "controlled vocabulary (plural controlled vocabularies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Information science"
      ],
      "glosses": [
        "A carefully selected set of terms – words and phrases – such that each concept from the domain of discourse is described using only one term in the set and each term in the set describes only one concept."
      ],
      "links": [
        [
          "information science",
          "information science"
        ],
        [
          "term",
          "term"
        ],
        [
          "concept",
          "concept"
        ],
        [
          "domain of discourse",
          "domain of discourse"
        ]
      ],
      "raw_glosses": [
        "(information science) A carefully selected set of terms – words and phrases – such that each concept from the domain of discourse is described using only one term in the set and each term in the set describes only one concept."
      ],
      "topics": [
        "computing",
        "engineering",
        "human-sciences",
        "information-science",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "controlled vocabulary"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "carefully selected set of terms",
      "word": "受控詞表"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "shòukòng cíbiǎo",
      "sense": "carefully selected set of terms",
      "word": "受控词表"
    },
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "carefully selected set of terms",
      "tags": [
        "masculine"
      ],
      "word": "řízený slovník"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "carefully selected set of terms",
      "word": "kontrolloitu sanasto"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "carefully selected set of terms",
      "word": "supil na sansalitaan"
    }
  ],
  "word": "controlled vocabulary"
}