"Ngrs" meaning in French

{
  "forms": [
    {
      "form": "Nᵍʳˢ",
      "tags": [
        "canonical",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "noun",
        "g": "p",
        "head": "Nᵍʳˢ"
      },
      "expansion": "Nᵍʳˢ pl",
      "name": "head"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Nosseigneurs"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Titles",
          "orig": "fr:Titles",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of Nosseigneurs."
      ],
      "id": "en-Ngrs-fr-noun-bk3ystMS",
      "links": [
        [
          "Nosseigneurs",
          "Nosseigneurs#French"
        ]
      ],
      "related": [
        {
          "word": "Mgr"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "Ngrs"
}

{
  "forms": [
    {
      "form": "Nᵍʳˢ",
      "tags": [
        "canonical",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "noun",
        "g": "p",
        "head": "Nᵍʳˢ"
      },
      "expansion": "Nᵍʳˢ pl",
      "name": "head"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "Mgr"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "Nosseigneurs"
        }
      ],
      "categories": [
        "French abbreviations",
        "French entries with incorrect language header",
        "French lemmas",
        "French nouns",
        "French pluralia tantum",
        "fr:Titles"
      ],
      "glosses": [
        "Abbreviation of Nosseigneurs."
      ],
      "links": [
        [
          "Nosseigneurs",
          "Nosseigneurs#French"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "Ngrs"
}