"коленна" meaning in Bulgarian

{
  "forms": [
    {
      "form": "коле́нна",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kolénna",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bg",
        "2": "adjective form",
        "head": "коле́нна"
      },
      "expansion": "коле́нна • (kolénna)",
      "name": "head"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bulgarian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "knee joint",
          "roman": "kolénna stáva",
          "text": "коле́нна ста́ва",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "kolénen",
          "word": "коле́нен"
        }
      ],
      "glosses": [
        "indefinite feminine singular of коле́нен (kolénen)"
      ],
      "id": "en-коленна-bg-adj-9xIwWy~3",
      "links": [
        [
          "коле́нен",
          "коленен#Bulgarian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "indefinite",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[koˈlɛnnɐ]"
    }
  ],
  "word": "коленна"
}

{
  "forms": [
    {
      "form": "коле́нна",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kolénna",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bg",
        "2": "adjective form",
        "head": "коле́нна"
      },
      "expansion": "коле́нна • (kolénna)",
      "name": "head"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Bulgarian adjective forms",
        "Bulgarian entries with incorrect language header",
        "Bulgarian non-lemma forms",
        "Bulgarian terms with IPA pronunciation",
        "Bulgarian terms with usage examples"
      ],
      "examples": [
        {
          "english": "knee joint",
          "roman": "kolénna stáva",
          "text": "коле́нна ста́ва",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "kolénen",
          "word": "коле́нен"
        }
      ],
      "glosses": [
        "indefinite feminine singular of коле́нен (kolénen)"
      ],
      "links": [
        [
          "коле́нен",
          "коленен#Bulgarian"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "indefinite",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[koˈlɛnnɐ]"
    }
  ],
  "word": "коленна"
}