"contrast set" meaning in English

{
  "forms": [
    {
      "form": "contrast sets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contrast set (plural contrast sets)",
      "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": "Linguistics",
          "orig": "en:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1996, Toshio Inui, James L. McClelland, Attention and Performance XVI",
          "text": "The notion of a contrast set is made explicit in recent work in formal semantics (Krifka 1991; Rooth 1985).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A set of concepts whose names are coordinate terms."
      ],
      "id": "en-contrast_set-en-noun-yBo7BQde",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "coordinate term",
          "coordinate term"
        ]
      ],
      "raw_glosses": [
        "(linguistics) A set of concepts whose names are coordinate terms."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "contrast set"
      ]
    }
  ],
  "word": "contrast set"
}

{
  "forms": [
    {
      "form": "contrast sets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contrast set (plural contrast sets)",
      "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",
        "English terms with quotations",
        "en:Linguistics"
      ],
      "examples": [
        {
          "ref": "1996, Toshio Inui, James L. McClelland, Attention and Performance XVI",
          "text": "The notion of a contrast set is made explicit in recent work in formal semantics (Krifka 1991; Rooth 1985).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A set of concepts whose names are coordinate terms."
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "coordinate term",
          "coordinate term"
        ]
      ],
      "raw_glosses": [
        "(linguistics) A set of concepts whose names are coordinate terms."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "contrast set"
      ]
    }
  ],
  "word": "contrast set"
}