"os bru" meaning in Catalan

{
  "forms": [
    {
      "form": "ossos bruns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "ossos bruns"
      },
      "expansion": "os bru m (plural ossos bruns)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "ca",
          "name": "Ursids",
          "orig": "ca:Ursids",
          "parents": [
            "Carnivores",
            "Mammals",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "brown bear"
      ],
      "id": "en-os_bru-ca-noun-OKy9nU1Y",
      "links": [
        [
          "brown bear",
          "brown bear"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "ca:os bru"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈoz ˈbɾu]",
      "tags": [
        "Balearic",
        "Central",
        "Valencia"
      ]
    }
  ],
  "word": "os bru"
}

{
  "forms": [
    {
      "form": "ossos bruns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "ossos bruns"
      },
      "expansion": "os bru m (plural ossos bruns)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Catalan countable nouns",
        "Catalan entries with incorrect language header",
        "Catalan lemmas",
        "Catalan masculine nouns",
        "Catalan multiword terms",
        "Catalan nouns",
        "Catalan terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "ca:Ursids"
      ],
      "glosses": [
        "brown bear"
      ],
      "links": [
        [
          "brown bear",
          "brown bear"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "ca:os bru"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈoz ˈbɾu]",
      "tags": [
        "Balearic",
        "Central",
        "Valencia"
      ]
    }
  ],
  "word": "os bru"
}