"O2" meaning in English

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  "lang_code": "en",
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      "glosses": [
        "Both eyes."
      ],
      "id": "en-O2-en-symbol-YBZtI86v",
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          "Both",
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          "eye",
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        "(medicine) Both eyes."
      ],
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        "medicine",
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  "word": "O2"
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    {
      "_dis1": "0 0",
      "english": "original name of the building",
      "word": "Millennium Dome"
    }
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      "glosses": [
        "A large entertainment district in Greenwich, London."
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        "The arena and concert venue at the center of said district."
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      "_dis1": "0 0",
      "english": "official",
      "word": "The O2"
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  "word": "O2"
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  "lang_code": "en",
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        "Both eyes."
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        "(medicine) Both eyes."
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      "topics": [
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  "word": "O2"
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  "related": [
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      "english": "original name of the building",
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      "categories": [
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        "The arena and concert venue at the center of said district."
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      "word": "The O2"
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  "word": "O2"
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