"OW" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
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        {
          "word": "Open Water"
        }
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Underwater diving",
          "orig": "en:Underwater diving",
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            "Water sports",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
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            "Fundamental"
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      "glosses": [
        "Acronym of Open Water."
      ],
      "id": "en-OW-en-name-aV0zOZH7",
      "links": [
        [
          "underwater",
          "underwater"
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        [
          "diving",
          "diving#Noun"
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          "Open Water",
          "w:Open Water Diver"
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        "(underwater diving) Acronym of Open Water."
      ],
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        "abbreviation",
        "acronym",
        "alt-of"
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      "topics": [
        "diving",
        "hobbies",
        "lifestyle",
        "sports",
        "underwater-diving"
      ]
    }
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  "word": "OW"
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      "expansion": "OW",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Open Water"
        }
      ],
      "categories": [
        "English acronyms",
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        "en:Underwater diving"
      ],
      "glosses": [
        "Acronym of Open Water."
      ],
      "links": [
        [
          "underwater",
          "underwater"
        ],
        [
          "diving",
          "diving#Noun"
        ],
        [
          "Open Water",
          "w:Open Water Diver"
        ]
      ],
      "raw_glosses": [
        "(underwater diving) Acronym of Open Water."
      ],
      "tags": [
        "abbreviation",
        "acronym",
        "alt-of"
      ],
      "topics": [
        "diving",
        "hobbies",
        "lifestyle",
        "sports",
        "underwater-diving"
      ]
    }
  ],
  "word": "OW"
}