"propositus" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "propositus"
      },
      "expansion": "Latin propositus",
      "name": "bor"
    }
  ],
  "etymology_text": "Latin propositus",
  "forms": [
    {
      "form": "propositi",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "propositi"
      },
      "expansion": "propositus (plural propositi)",
      "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"
        }
      ],
      "coordinate_terms": [
        {
          "tags": [
            "feminine"
          ],
          "word": "proposita"
        }
      ],
      "examples": [
        {
          "text": "The propositus was an elderly man who passed on the disorder to three of his four children and 9 of 14 grandchildren."
        }
      ],
      "glosses": [
        "The first identified male case of an inherited disease in a family; the proband or index case."
      ],
      "id": "en-propositus-en-noun-ZYVNK-Nl",
      "links": [
        [
          "male",
          "male"
        ],
        [
          "inherited",
          "inherited"
        ],
        [
          "disease",
          "disease"
        ],
        [
          "proband",
          "proband"
        ]
      ]
    }
  ],
  "word": "propositus"
}

{
  "coordinate_terms": [
    {
      "tags": [
        "feminine"
      ],
      "word": "proposita"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "propositus"
      },
      "expansion": "Latin propositus",
      "name": "bor"
    }
  ],
  "etymology_text": "Latin propositus",
  "forms": [
    {
      "form": "propositi",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "propositi"
      },
      "expansion": "propositus (plural propositi)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms borrowed from Latin",
        "English terms derived from Latin"
      ],
      "examples": [
        {
          "text": "The propositus was an elderly man who passed on the disorder to three of his four children and 9 of 14 grandchildren."
        }
      ],
      "glosses": [
        "The first identified male case of an inherited disease in a family; the proband or index case."
      ],
      "links": [
        [
          "male",
          "male"
        ],
        [
          "inherited",
          "inherited"
        ],
        [
          "disease",
          "disease"
        ],
        [
          "proband",
          "proband"
        ]
      ]
    }
  ],
  "word": "propositus"
}