"open o" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
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      "expansion": "open o",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "88 12",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w+disamb"
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          "_dis": "94 6",
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          "_dis": "89 11",
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          "name": "Terms with French translations",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The letter o pronounced as the open-mid back rounded vowel."
      ],
      "id": "en-open_o-en-noun-j0NZcPY9",
      "links": [
        [
          "open-mid",
          "open-mid"
        ],
        [
          "back",
          "back"
        ],
        [
          "rounded",
          "rounded"
        ],
        [
          "vowel",
          "vowel"
        ]
      ],
      "qualifier": "Italian",
      "raw_glosses": [
        "(French, Italian) The letter o pronounced as the open-mid back rounded vowel."
      ],
      "related": [
        {
          "_dis1": "97 3",
          "word": "closed e"
        },
        {
          "_dis1": "97 3",
          "word": "closed o"
        },
        {
          "_dis1": "97 3",
          "word": "mute e"
        },
        {
          "_dis1": "97 3",
          "word": "open e"
        }
      ],
      "tags": [
        "French"
      ],
      "translations": [
        {
          "_dis1": "93 7",
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "o ouvert"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Phonetics",
          "orig": "en:Phonetics",
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            "Communication",
            "Sciences",
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        }
      ],
      "glosses": [
        "The letter ⟨ɔ⟩."
      ],
      "id": "en-open_o-en-noun-d512Nu2Q",
      "links": [
        [
          "phonetics",
          "phonetics"
        ],
        [
          "ɔ",
          "ɔ"
        ]
      ],
      "raw_glosses": [
        "(phonetics) The letter ⟨ɔ⟩."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonetics",
        "phonology",
        "sciences"
      ]
    }
  ],
  "word": "open o"
}

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  "head_templates": [
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      "expansion": "open o",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "closed e"
    },
    {
      "word": "closed o"
    },
    {
      "word": "mute e"
    },
    {
      "word": "open e"
    }
  ],
  "senses": [
    {
      "glosses": [
        "The letter o pronounced as the open-mid back rounded vowel."
      ],
      "links": [
        [
          "open-mid",
          "open-mid"
        ],
        [
          "back",
          "back"
        ],
        [
          "rounded",
          "rounded"
        ],
        [
          "vowel",
          "vowel"
        ]
      ],
      "qualifier": "Italian",
      "raw_glosses": [
        "(French, Italian) The letter o pronounced as the open-mid back rounded vowel."
      ],
      "tags": [
        "French"
      ]
    },
    {
      "categories": [
        "en:Phonetics"
      ],
      "glosses": [
        "The letter ⟨ɔ⟩."
      ],
      "links": [
        [
          "phonetics",
          "phonetics"
        ],
        [
          "ɔ",
          "ɔ"
        ]
      ],
      "raw_glosses": [
        "(phonetics) The letter ⟨ɔ⟩."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonetics",
        "phonology",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "o ouvert"
    }
  ],
  "word": "open o"
}