"биения" meaning in Bulgarian

{
  "forms": [
    {
      "form": "би́ения",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "bíenija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bulgarian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "87 7 6",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "extra": "bíene",
          "word": "би́ене"
        }
      ],
      "glosses": [
        "indefinite plural of би́ене (bíene)"
      ],
      "id": "en-биения-bg-noun-K3Ihg0PA",
      "links": [
        [
          "би́ене",
          "биене#Bulgarian"
        ]
      ],
      "tags": [
        "form-of",
        "indefinite",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbiɛnijɐ]"
    }
  ],
  "word": "биения"
}

{
  "categories": [
    "Pages with 2 entries"
  ],
  "forms": [
    {
      "form": "би́ения",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "bíenija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Bulgarian entries with incorrect language header",
        "Bulgarian non-lemma forms",
        "Bulgarian noun forms",
        "Bulgarian terms with IPA pronunciation",
        "Pages with 2 entries"
      ],
      "form_of": [
        {
          "extra": "bíene",
          "word": "би́ене"
        }
      ],
      "glosses": [
        "indefinite plural of би́ене (bíene)"
      ],
      "links": [
        [
          "би́ене",
          "биене#Bulgarian"
        ]
      ],
      "tags": [
        "form-of",
        "indefinite",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbiɛnijɐ]"
    }
  ],
  "word": "биения"
}