"кн." meaning in Ukrainian

{
  "forms": [
    {
      "form": "kn.",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "f-in",
        "3": "-"
      },
      "expansion": "кн. • (kn.) f inan (indeclinable)",
      "name": "uk-noun"
    }
  ],
  "lang": "Ukrainian",
  "lang_code": "uk",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "knyha, “book”",
          "word": "книга"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ukrainian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of книга (knyha, “book”)."
      ],
      "id": "en-кн.-uk-noun-BcrgeqRI",
      "links": [
        [
          "книга",
          "книга#Ukrainian"
        ],
        [
          "book",
          "book"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable"
      ]
    }
  ],
  "word": "кн."
}

{
  "forms": [
    {
      "form": "kn.",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "f-in",
        "3": "-"
      },
      "expansion": "кн. • (kn.) f inan (indeclinable)",
      "name": "uk-noun"
    }
  ],
  "lang": "Ukrainian",
  "lang_code": "uk",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "knyha, “book”",
          "word": "книга"
        }
      ],
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Ukrainian abbreviations",
        "Ukrainian entries with incorrect language header",
        "Ukrainian feminine nouns",
        "Ukrainian inanimate nouns",
        "Ukrainian indeclinable nouns",
        "Ukrainian lemmas",
        "Ukrainian nouns",
        "Ukrainian terms spelled with .",
        "Ukrainian terms with redundant head parameter"
      ],
      "glosses": [
        "Abbreviation of книга (knyha, “book”)."
      ],
      "links": [
        [
          "книга",
          "книга#Ukrainian"
        ],
        [
          "book",
          "book"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable"
      ]
    }
  ],
  "word": "кн."
}