"casus rectus" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cāsus rēctus",
        "lit": "straight case"
      },
      "expansion": "Learned borrowing from Latin cāsus rēctus (literally “straight case”)",
      "name": "lbor"
    }
  ],
  "etymology_text": "Learned borrowing from Latin cāsus rēctus (literally “straight case”).",
  "forms": [
    {
      "form": "casus recti",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "casus recti",
        "nolinkhead": "1"
      },
      "expansion": "casus rectus (plural casus recti)",
      "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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Grammar",
          "orig": "en:Grammar",
          "parents": [
            "Linguistics",
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Grammatical cases",
          "orig": "en:Grammatical cases",
          "parents": [
            "Grammar",
            "Linguistics",
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The nominative case, sometimes grouped with the vocative case, as a single morphological case contrasted with the oblique case."
      ],
      "id": "en-casus_rectus-en-noun-aM6JZxLS",
      "links": [
        [
          "grammar",
          "grammar"
        ],
        [
          "nominative case",
          "nominative case"
        ],
        [
          "vocative case",
          "vocative case"
        ],
        [
          "oblique case",
          "oblique case"
        ]
      ],
      "raw_glosses": [
        "(grammar, dated) The nominative case, sometimes grouped with the vocative case, as a single morphological case contrasted with the oblique case."
      ],
      "synonyms": [
        {
          "word": "direct case"
        },
        {
          "word": "rectus casus"
        }
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "grammar",
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "casus rectus"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cāsus rēctus",
        "lit": "straight case"
      },
      "expansion": "Learned borrowing from Latin cāsus rēctus (literally “straight case”)",
      "name": "lbor"
    }
  ],
  "etymology_text": "Learned borrowing from Latin cāsus rēctus (literally “straight case”).",
  "forms": [
    {
      "form": "casus recti",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "casus recti",
        "nolinkhead": "1"
      },
      "expansion": "casus rectus (plural casus recti)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English learned borrowings from Latin",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms borrowed from Latin",
        "English terms derived from Latin",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Grammar",
        "en:Grammatical cases"
      ],
      "glosses": [
        "The nominative case, sometimes grouped with the vocative case, as a single morphological case contrasted with the oblique case."
      ],
      "links": [
        [
          "grammar",
          "grammar"
        ],
        [
          "nominative case",
          "nominative case"
        ],
        [
          "vocative case",
          "vocative case"
        ],
        [
          "oblique case",
          "oblique case"
        ]
      ],
      "raw_glosses": [
        "(grammar, dated) The nominative case, sometimes grouped with the vocative case, as a single morphological case contrasted with the oblique case."
      ],
      "synonyms": [
        {
          "word": "direct case"
        }
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "grammar",
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "rectus casus"
    }
  ],
  "word": "casus rectus"
}