"ne plus ultra" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ""
      },
      "expansion": "Ellipsis",
      "name": "ellipsis"
    },
    {
      "args": {
        "1": "la",
        "2": "prōgredior",
        "3": "prōgrediāris",
        "4": "may you advance"
      },
      "expansion": "prōgrediāris (“may you advance”)",
      "name": "m"
    },
    {
      "args": {
        "1": "la",
        "2": "fierī possit",
        "3": "",
        "4": "so that ... is impossible"
      },
      "expansion": "fierī possit (“so that ... is impossible”)",
      "name": "m"
    }
  ],
  "etymology_text": "Ellipsis of a subjunctive verb like prōgrediāris (“may you advance”); or reinterpreted as a negative result clause with ellipsis of fierī possit (“so that ... is impossible”).",
  "forms": [
    {
      "form": "nē plūs ultra",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "phrase",
        "head": "nē plūs ultra"
      },
      "expansion": "nē plūs ultra",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "A warning to not go beyond a certain point.",
          "word": "nōn plūs ultrā"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Latin ellipses",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of nōn plūs ultrā (“A warning to not go beyond a certain point.”)"
      ],
      "id": "en-ne_plus_ultra-la-phrase-BPwF6~5E",
      "links": [
        [
          "nōn plūs ultrā",
          "non plus ultra#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/neː pluːs ˈul.traː/",
      "tags": [
        "Classical"
      ]
    },
    {
      "ipa": "[neː pɫ̪uːs̠ ˈʊɫ̪t̪räː]",
      "tags": [
        "Classical"
      ]
    },
    {
      "ipa": "/ne plus ˈul.tra/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[nɛː plus ˈul̪t̪rä]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "ne plus ultra"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ""
      },
      "expansion": "Ellipsis",
      "name": "ellipsis"
    },
    {
      "args": {
        "1": "la",
        "2": "prōgredior",
        "3": "prōgrediāris",
        "4": "may you advance"
      },
      "expansion": "prōgrediāris (“may you advance”)",
      "name": "m"
    },
    {
      "args": {
        "1": "la",
        "2": "fierī possit",
        "3": "",
        "4": "so that ... is impossible"
      },
      "expansion": "fierī possit (“so that ... is impossible”)",
      "name": "m"
    }
  ],
  "etymology_text": "Ellipsis of a subjunctive verb like prōgrediāris (“may you advance”); or reinterpreted as a negative result clause with ellipsis of fierī possit (“so that ... is impossible”).",
  "forms": [
    {
      "form": "nē plūs ultra",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "phrase",
        "head": "nē plūs ultra"
      },
      "expansion": "nē plūs ultra",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "A warning to not go beyond a certain point.",
          "word": "nōn plūs ultrā"
        }
      ],
      "categories": [
        "Latin ellipses",
        "Latin entries with incorrect language header",
        "Latin lemmas",
        "Latin multiword terms",
        "Latin phrases",
        "Latin terms with IPA pronunciation"
      ],
      "glosses": [
        "Alternative form of nōn plūs ultrā (“A warning to not go beyond a certain point.”)"
      ],
      "links": [
        [
          "nōn plūs ultrā",
          "non plus ultra#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/neː pluːs ˈul.traː/",
      "tags": [
        "Classical"
      ]
    },
    {
      "ipa": "[neː pɫ̪uːs̠ ˈʊɫ̪t̪räː]",
      "tags": [
        "Classical"
      ]
    },
    {
      "ipa": "/ne plus ˈul.tra/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[nɛː plus ˈul̪t̪rä]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "ne plus ultra"
}