"вв" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "века́"
      },
      "expansion": "Abbreviation of века́ (veká)",
      "name": "abbrev"
    }
  ],
  "etymology_text": "Abbreviation of века́ (veká).",
  "forms": [
    {
      "form": "vv",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in-p",
        "3": "-"
      },
      "expansion": "вв • (vv) m inan pl (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "centuries"
      ],
      "id": "en-вв-ru-noun-my~xaacy",
      "links": [
        [
          "centuries",
          "centuries"
        ]
      ],
      "related": [
        {
          "english": "century; v.",
          "word": "в."
        }
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "word": "вв"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "века́"
      },
      "expansion": "Abbreviation of века́ (veká)",
      "name": "abbrev"
    }
  ],
  "etymology_text": "Abbreviation of века́ (veká).",
  "forms": [
    {
      "form": "vv",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in-p",
        "3": "-"
      },
      "expansion": "вв • (vv) m inan pl (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "related": [
    {
      "english": "century; v.",
      "word": "в."
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian abbreviations",
        "Russian entries with incorrect language header",
        "Russian inanimate nouns",
        "Russian indeclinable nouns",
        "Russian lemmas",
        "Russian links with redundant wikilinks",
        "Russian masculine nouns",
        "Russian nouns",
        "Russian pluralia tantum",
        "Russian terms with redundant head parameter"
      ],
      "glosses": [
        "centuries"
      ],
      "links": [
        [
          "centuries",
          "centuries"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "word": "вв"
}