"Orolaunum" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Localités de Belgique en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Localités de Gaule en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms propres en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "glosses": [
        "Ville de la Gaule belgique, actuel Arlon, en Belgique."
      ],
      "id": "fr-Orolaunum-la-name-5~QULKUK",
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "Orolaunum"
}

{
  "categories": [
    "Localités de Belgique en latin",
    "Localités de Gaule en latin",
    "Noms propres en latin",
    "latin"
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "glosses": [
        "Ville de la Gaule belgique, actuel Arlon, en Belgique."
      ],
      "topics": [
        "geography"
      ]
    }
  ],
  "word": "Orolaunum"
}