"o" meaning in Old Galician-Portuguese

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gl",
            "2": "o"
          },
          "expansion": "Galician: o",
          "name": "desc"
        }
      ],
      "text": "Galician: o"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pt",
            "2": "o"
          },
          "expansion": "Portuguese: o",
          "name": "desc"
        }
      ],
      "text": "Portuguese: o"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "illum"
      },
      "expansion": "Latin illum",
      "name": "inh"
    },
    {
      "args": {
        "1": "es",
        "2": "lo"
      },
      "expansion": "Spanish lo",
      "name": "cog"
    },
    {
      "args": {
        "1": "es",
        "2": "la"
      },
      "expansion": "la",
      "name": "m"
    }
  ],
  "etymology_text": "From earlier lo, la, from Latin illum, illam (the initial l having disappeared; compare Spanish lo and la).",
  "head_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "articles"
      },
      "expansion": "o",
      "name": "head"
    }
  ],
  "lang": "Old Galician-Portuguese",
  "lang_code": "roa-opt",
  "pos": "article",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Galician-Portuguese articles",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old Galician-Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "This is how Holy Mary added the wine to the barrel, out of love for the good lady of Britain;",
          "ref": "13th Century - Cantiga de Santa Maria no. 23",
          "text": "Esta é como Santa Maria acrecentou o vinho no tonel, por amor da bõa dona de Bretanha."
        },
        {
          "english": "This is how Holy Mary restricted the water of the fountain from the knight.",
          "ref": "13th Century - Cantiga de Santa Maria no. 48",
          "text": "Esta é como Santa Maria tolheu a agua da fonte ao cavaleiro."
        }
      ],
      "glosses": [
        "the (masculine singular definite article)"
      ],
      "id": "en-o-roa-opt-article-roa_opt:article",
      "links": [
        [
          "the",
          "the#English"
        ]
      ],
      "senseid": [
        "roa-opt:article"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/o/",
      "tags": [
        "article"
      ]
    }
  ],
  "word": "o"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "gl",
            "2": "o"
          },
          "expansion": "Galician: o",
          "name": "desc"
        }
      ],
      "text": "Galician: o"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "pt",
            "2": "o"
          },
          "expansion": "Portuguese: o",
          "name": "desc"
        }
      ],
      "text": "Portuguese: o"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "la",
        "3": "illum"
      },
      "expansion": "Latin illum",
      "name": "inh"
    },
    {
      "args": {
        "1": "es",
        "2": "lo"
      },
      "expansion": "Spanish lo",
      "name": "cog"
    },
    {
      "args": {
        "1": "es",
        "2": "la"
      },
      "expansion": "la",
      "name": "m"
    }
  ],
  "etymology_text": "From earlier lo, la, from Latin illum, illam (the initial l having disappeared; compare Spanish lo and la).",
  "head_templates": [
    {
      "args": {
        "1": "roa-opt",
        "2": "articles"
      },
      "expansion": "o",
      "name": "head"
    }
  ],
  "lang": "Old Galician-Portuguese",
  "lang_code": "roa-opt",
  "pos": "article",
  "senses": [
    {
      "categories": [
        "Old Galician-Portuguese articles",
        "Old Galician-Portuguese entries with incorrect language header",
        "Old Galician-Portuguese lemmas",
        "Old Galician-Portuguese terms derived from Latin",
        "Old Galician-Portuguese terms inherited from Latin",
        "Old Galician-Portuguese terms with IPA pronunciation",
        "Pages with raw sortkeys"
      ],
      "examples": [
        {
          "english": "This is how Holy Mary added the wine to the barrel, out of love for the good lady of Britain;",
          "ref": "13th Century - Cantiga de Santa Maria no. 23",
          "text": "Esta é como Santa Maria acrecentou o vinho no tonel, por amor da bõa dona de Bretanha."
        },
        {
          "english": "This is how Holy Mary restricted the water of the fountain from the knight.",
          "ref": "13th Century - Cantiga de Santa Maria no. 48",
          "text": "Esta é como Santa Maria tolheu a agua da fonte ao cavaleiro."
        }
      ],
      "glosses": [
        "the (masculine singular definite article)"
      ],
      "links": [
        [
          "the",
          "the#English"
        ]
      ],
      "senseid": [
        "roa-opt:article"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/o/",
      "tags": [
        "article"
      ]
    }
  ],
  "word": "o"
}