"Славония" meaning in Bulgarian

{
  "forms": [
    {
      "form": "Slavonija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "Славония"
      },
      "expansion": "Славония • (Slavonija)",
      "name": "bg-proper noun"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bulgarian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "bg",
          "name": "Places in Croatia",
          "orig": "bg:Places in Croatia",
          "parents": [
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Slavonia (a region of Croatia)"
      ],
      "id": "en-Славония-bg-name-skNrnbqX",
      "links": [
        [
          "Slavonia",
          "Slavonia#English"
        ],
        [
          "Croatia",
          "Croatia#English"
        ]
      ]
    }
  ],
  "word": "Славония"
}

{
  "forms": [
    {
      "form": "Slavonija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "Славония"
      },
      "expansion": "Славония • (Slavonija)",
      "name": "bg-proper noun"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Bulgarian entries with incorrect language header",
        "Bulgarian lemmas",
        "Bulgarian proper nouns",
        "Bulgarian terms with redundant head parameter",
        "bg:Places in Croatia"
      ],
      "glosses": [
        "Slavonia (a region of Croatia)"
      ],
      "links": [
        [
          "Slavonia",
          "Slavonia#English"
        ],
        [
          "Croatia",
          "Croatia#English"
        ]
      ]
    }
  ],
  "word": "Славония"
}