"Kanizsa triangle" meaning in English

{
  "etymology_text": "Named after Gaetano Kanizsa.",
  "forms": [
    {
      "form": "Kanizsa triangles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Kanizsa triangle (plural Kanizsa triangles)",
      "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"
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          "source": "w"
        },
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          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Optical illusions",
          "orig": "en:Optical illusions",
          "parents": [
            "Vision",
            "Senses",
            "Perception",
            "Body",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), page 67",
          "text": "It is called a Kanizsa triangle, after the Italian psychologist Gaetano Kanizsa, who created it in 1955.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An optical illusion in which a number of spatially separated fragments give the illusory impression of the contours of a triangle."
      ],
      "id": "en-Kanizsa_triangle-en-noun-3BrF8b5E",
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "fragment",
          "fragment"
        ],
        [
          "illusory",
          "illusory"
        ],
        [
          "impression",
          "impression"
        ],
        [
          "contour",
          "contour"
        ],
        [
          "triangle",
          "triangle"
        ]
      ],
      "wikipedia": [
        "Gaetano Kanizsa"
      ]
    }
  ],
  "word": "Kanizsa triangle"
}

{
  "etymology_text": "Named after Gaetano Kanizsa.",
  "forms": [
    {
      "form": "Kanizsa triangles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Kanizsa triangle (plural Kanizsa triangles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English entries with topic categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "en:Optical illusions"
      ],
      "examples": [
        {
          "ref": "2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), page 67",
          "text": "It is called a Kanizsa triangle, after the Italian psychologist Gaetano Kanizsa, who created it in 1955.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An optical illusion in which a number of spatially separated fragments give the illusory impression of the contours of a triangle."
      ],
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "fragment",
          "fragment"
        ],
        [
          "illusory",
          "illusory"
        ],
        [
          "impression",
          "impression"
        ],
        [
          "contour",
          "contour"
        ],
        [
          "triangle",
          "triangle"
        ]
      ],
      "wikipedia": [
        "Gaetano Kanizsa"
      ]
    }
  ],
  "word": "Kanizsa triangle"
}