"rares" meaning in Français

{
  "anagrams": [
    {
      "word": "Arres"
    },
    {
      "word": "erras"
    },
    {
      "word": "ESARR"
    },
    {
      "word": "raser"
    },
    {
      "word": "Sarre"
    },
    {
      "word": "Serra"
    },
    {
      "word": "serra"
    }
  ],
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’adjectifs en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "rare",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en français",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Daniel Simon, Martine François, Conserves traditionnelles et fermières : Guide pratique de la stérilisation, 2005",
          "text": "Le pleurote est l’un des rares champignons dont on maîtrise la pousse."
        },
        {
          "ref": "Bulletin de la Société archéologique, historique et scientifique de Soissons, 1878, page 167",
          "text": "Dans les bahuts brille la vaisselle d’argent armoiriée à côté de faïences et de porcelaines rares."
        }
      ],
      "form_of": [
        {
          "word": "rare"
        }
      ],
      "glosses": [
        "Pluriel de rare."
      ],
      "id": "fr-rares-fr-adj-vUWMZvLN"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ʁaʁ\\"
    },
    {
      "audio": "LL-Q150 (fra)-WikiLucas00-rares.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8e/LL-Q150_(fra)-WikiLucas00-rares.wav/LL-Q150_(fra)-WikiLucas00-rares.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8e/LL-Q150_(fra)-WikiLucas00-rares.wav/LL-Q150_(fra)-WikiLucas00-rares.wav.ogg",
      "raw_tags": [
        "France (Lyon)"
      ],
      "wav_url": "https://commons.wikimedia.org/wiki/Special:FilePath/LL-Q150 (fra)-WikiLucas00-rares.wav"
    }
  ],
  "tags": [
    "feminine",
    "form-of",
    "masculine"
  ],
  "word": "rares"
}

{
  "anagrams": [
    {
      "word": "Arres"
    },
    {
      "word": "erras"
    },
    {
      "word": "ESARR"
    },
    {
      "word": "raser"
    },
    {
      "word": "Sarre"
    },
    {
      "word": "Serra"
    },
    {
      "word": "serra"
    }
  ],
  "categories": [
    "Formes d’adjectifs en français",
    "français"
  ],
  "forms": [
    {
      "form": "rare",
      "tags": [
        "singular"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        "Exemples en français"
      ],
      "examples": [
        {
          "ref": "Daniel Simon, Martine François, Conserves traditionnelles et fermières : Guide pratique de la stérilisation, 2005",
          "text": "Le pleurote est l’un des rares champignons dont on maîtrise la pousse."
        },
        {
          "ref": "Bulletin de la Société archéologique, historique et scientifique de Soissons, 1878, page 167",
          "text": "Dans les bahuts brille la vaisselle d’argent armoiriée à côté de faïences et de porcelaines rares."
        }
      ],
      "form_of": [
        {
          "word": "rare"
        }
      ],
      "glosses": [
        "Pluriel de rare."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ʁaʁ\\"
    },
    {
      "audio": "LL-Q150 (fra)-WikiLucas00-rares.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8e/LL-Q150_(fra)-WikiLucas00-rares.wav/LL-Q150_(fra)-WikiLucas00-rares.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8e/LL-Q150_(fra)-WikiLucas00-rares.wav/LL-Q150_(fra)-WikiLucas00-rares.wav.ogg",
      "raw_tags": [
        "France (Lyon)"
      ],
      "wav_url": "https://commons.wikimedia.org/wiki/Special:FilePath/LL-Q150 (fra)-WikiLucas00-rares.wav"
    }
  ],
  "tags": [
    "feminine",
    "form-of",
    "masculine"
  ],
  "word": "rares"
}