"Об" meaning in Tchouvache

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms propres en tchouvache",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Tchouvache",
      "orig": "tchouvache",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Tchouvache",
  "lang_code": "cv",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Cours d’eau de France en tchouvache",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Aube."
      ],
      "id": "fr-Об-cv-name-Vyekozpd",
      "topics": [
        "geography"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Départements de France en tchouvache",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Département de l’Aube."
      ],
      "id": "fr-Об-cv-name-vn~-vlN0",
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "Об"
}

{
  "categories": [
    "Noms propres en tchouvache",
    "tchouvache"
  ],
  "lang": "Tchouvache",
  "lang_code": "cv",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        "Cours d’eau de France en tchouvache"
      ],
      "glosses": [
        "Aube."
      ],
      "topics": [
        "geography"
      ]
    },
    {
      "categories": [
        "Départements de France en tchouvache"
      ],
      "glosses": [
        "Département de l’Aube."
      ],
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "Об"
}