"былины" meaning in Russian

{
  "forms": [
    {
      "form": "были́ны",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "bylíny",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "noun form",
        "g": "f-in",
        "g2": "f-in-p",
        "head": "были́ны"
      },
      "expansion": "были́ны • (bylíny) f inan or f inan pl",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "60 40",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "84 16",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "73 27",
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "extra": "(bylína):",
          "word": "были́на"
        }
      ],
      "glosses": [
        "inflection of были́на (bylína):",
        "genitive singular"
      ],
      "id": "en-былины-ru-noun-wkZ9BDxX",
      "links": [
        [
          "были́на",
          "былина#Russian"
        ]
      ],
      "tags": [
        "form-of",
        "genitive",
        "singular"
      ]
    },
    {
      "form_of": [
        {
          "extra": "(bylína):",
          "word": "были́на"
        }
      ],
      "glosses": [
        "inflection of были́на (bylína):",
        "nominative/accusative plural"
      ],
      "id": "en-былины-ru-noun-nOzRCxvG",
      "links": [
        [
          "были́на",
          "былина#Russian"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "nominative",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bɨˈlʲinɨ]"
    }
  ],
  "word": "былины"
}

{
  "categories": [
    "Pages with 1 entry",
    "Pages with entries",
    "Russian 3-syllable words",
    "Russian entries with incorrect language header",
    "Russian non-lemma forms",
    "Russian noun forms",
    "Russian terms with IPA pronunciation"
  ],
  "forms": [
    {
      "form": "были́ны",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "bylíny",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "noun form",
        "g": "f-in",
        "g2": "f-in-p",
        "head": "были́ны"
      },
      "expansion": "были́ны • (bylíny) f inan or f inan pl",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "form_of": [
        {
          "extra": "(bylína):",
          "word": "были́на"
        }
      ],
      "glosses": [
        "inflection of были́на (bylína):",
        "genitive singular"
      ],
      "links": [
        [
          "были́на",
          "былина#Russian"
        ]
      ],
      "tags": [
        "form-of",
        "genitive",
        "singular"
      ]
    },
    {
      "form_of": [
        {
          "extra": "(bylína):",
          "word": "были́на"
        }
      ],
      "glosses": [
        "inflection of были́на (bylína):",
        "nominative/accusative plural"
      ],
      "links": [
        [
          "были́на",
          "былина#Russian"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "nominative",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bɨˈlʲinɨ]"
    }
  ],
  "word": "былины"
}