"os" meaning in Polish

{
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "noun form",
        "g": "f"
      },
      "expansion": "os f",
      "name": "head"
    }
  ],
  "hyphenation": [
    "os"
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "osa"
        }
      ],
      "glosses": [
        "genitive plural of osa"
      ],
      "id": "en-os-pl-noun-gOhrt2Qw",
      "links": [
        [
          "osa",
          "osa#Polish"
        ]
      ],
      "synonyms": [
        {
          "word": "ós"
        }
      ],
      "tags": [
        "feminine",
        "form-of",
        "genitive",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɔs/"
    },
    {
      "rhymes": "-ɔs"
    },
    {
      "homophone": "oz"
    }
  ],
  "word": "os"
}

{
  "categories": [
    "White Hmong entries with incorrect language header",
    "White Hmong interjections",
    "White Hmong lemmas",
    "White Hmong terms with IPA pronunciation"
  ],
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "noun form",
        "g": "f"
      },
      "expansion": "os f",
      "name": "head"
    }
  ],
  "hyphenation": [
    "os"
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Polish 1-syllable words",
        "Polish entries with incorrect language header",
        "Polish non-lemma forms",
        "Polish noun forms",
        "Polish terms with IPA pronunciation",
        "Polish terms with audio links",
        "Polish terms with homophones",
        "Rhymes:Polish/ɔs",
        "Rhymes:Polish/ɔs/1 syllable"
      ],
      "form_of": [
        {
          "word": "osa"
        }
      ],
      "glosses": [
        "genitive plural of osa"
      ],
      "links": [
        [
          "osa",
          "osa#Polish"
        ]
      ],
      "synonyms": [
        {
          "word": "ós"
        }
      ],
      "tags": [
        "feminine",
        "form-of",
        "genitive",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɔs/"
    },
    {
      "rhymes": "-ɔs"
    },
    {
      "homophone": "oz"
    }
  ],
  "word": "os"
}