"vav" meaning in Turkish

{
  "etymology_templates": [
    {
      "args": {
        "1": "tr",
        "2": "ar",
        "3": "وَاو"
      },
      "expansion": "Arabic وَاو (wāw)",
      "name": "der"
    }
  ],
  "etymology_text": "From Arabic وَاو (wāw).",
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "noun"
      },
      "expansion": "vav",
      "name": "head"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 8 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Turkish entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Undetermined terms with redundant script codes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "tr",
          "name": "Arabic letter names",
          "orig": "tr:Arabic letter names",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Letter of the Arabic alphabet: و"
      ],
      "id": "en-vav-tr-noun-uQN5B4ln"
    }
  ],
  "word": "vav"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "tr",
        "2": "ar",
        "3": "وَاو"
      },
      "expansion": "Arabic وَاو (wāw)",
      "name": "der"
    }
  ],
  "etymology_text": "From Arabic وَاو (wāw).",
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "noun"
      },
      "expansion": "vav",
      "name": "head"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 8 entries",
        "Pages with entries",
        "Turkish entries with incorrect language header",
        "Turkish lemmas",
        "Turkish nouns",
        "Turkish palindromes",
        "Turkish terms derived from Arabic",
        "Undetermined terms with redundant script codes",
        "tr:Arabic letter names"
      ],
      "glosses": [
        "Letter of the Arabic alphabet: و"
      ]
    }
  ],
  "word": "vav"
}