"βασίλειον" meaning in Grec ancien

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Grec ancien",
      "orig": "grec ancien",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "βασίλειο"
    },
    {
      "lang": "Latin",
      "lang_code": "la",
      "word": "basileum"
    },
    {
      "lang": "Latin",
      "lang_code": "la",
      "word": "basilium"
    }
  ],
  "etymology_texts": [
    "Neutre substantivé de βασίλειος, basíleios (« royal »)."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "βασίλειον, basíleion"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en grec ancien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Palais royal."
      ],
      "id": "fr-βασίλειον-grc-noun-1H02bDHi"
    },
    {
      "glosses": [
        "Trésor royal."
      ],
      "id": "fr-βασίλειον-grc-noun-FgS4O8KZ"
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "βασίλειον"
}

{
  "categories": [
    "Noms communs en grec ancien",
    "grec ancien"
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "βασίλειο"
    },
    {
      "lang": "Latin",
      "lang_code": "la",
      "word": "basileum"
    },
    {
      "lang": "Latin",
      "lang_code": "la",
      "word": "basilium"
    }
  ],
  "etymology_texts": [
    "Neutre substantivé de βασίλειος, basíleios (« royal »)."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "βασίλειον, basíleion"
  ],
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en grec ancien"
      ],
      "glosses": [
        "Palais royal."
      ]
    },
    {
      "glosses": [
        "Trésor royal."
      ]
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "βασίλειον"
}