"-erna" meaning in Swedish

{
  "etymology_templates": [
    {
      "args": {
        "1": "sv",
        "2": "-er",
        "3": "-na",
        "qq1": "plural",
        "qq2": "definite"
      },
      "expansion": "-er (plural) + -na (definite)",
      "name": "af"
    },
    {
      "args": {
        "1": "da",
        "2": "-"
      },
      "expansion": "Danish",
      "name": "cog"
    },
    {
      "args": {
        "1": "nb",
        "2": "-"
      },
      "expansion": "Norwegian Bokmål",
      "name": "cog"
    },
    {
      "args": {
        "1": "nn",
        "2": "-ene"
      },
      "expansion": "Norwegian Nynorsk -ene",
      "name": "cog"
    },
    {
      "args": {
        "1": "da",
        "2": "-erne"
      },
      "expansion": "Danish -erne",
      "name": "cog"
    }
  ],
  "etymology_text": "-er (plural) + -na (definite). Usually corresponds to Danish, Norwegian Bokmål and Norwegian Nynorsk -ene (or Danish -erne)",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "suffix"
      },
      "expansion": "-erna",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish terms suffixed with -er",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish terms suffixed with -na",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Suffix for definite plural for nouns of the third declension (common and neuter gender) which in indefinite form have the suffix -er"
      ],
      "id": "en--erna-sv-suffix-RaDiD3qt",
      "links": [
        [
          "-er",
          "-er"
        ]
      ],
      "related": [
        {
          "word": "plural suffix"
        },
        {
          "word": "-orna"
        },
        {
          "word": "-arna"
        },
        {
          "word": "-rna"
        },
        {
          "word": "-na"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-erna"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sv",
        "2": "-er",
        "3": "-na",
        "qq1": "plural",
        "qq2": "definite"
      },
      "expansion": "-er (plural) + -na (definite)",
      "name": "af"
    },
    {
      "args": {
        "1": "da",
        "2": "-"
      },
      "expansion": "Danish",
      "name": "cog"
    },
    {
      "args": {
        "1": "nb",
        "2": "-"
      },
      "expansion": "Norwegian Bokmål",
      "name": "cog"
    },
    {
      "args": {
        "1": "nn",
        "2": "-ene"
      },
      "expansion": "Norwegian Nynorsk -ene",
      "name": "cog"
    },
    {
      "args": {
        "1": "da",
        "2": "-erne"
      },
      "expansion": "Danish -erne",
      "name": "cog"
    }
  ],
  "etymology_text": "-er (plural) + -na (definite). Usually corresponds to Danish, Norwegian Bokmål and Norwegian Nynorsk -ene (or Danish -erne)",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "suffix"
      },
      "expansion": "-erna",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "suffix",
  "related": [
    {
      "word": "plural suffix"
    },
    {
      "word": "-orna"
    },
    {
      "word": "-arna"
    },
    {
      "word": "-rna"
    },
    {
      "word": "-na"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Swedish entries with incorrect language header",
        "Swedish lemmas",
        "Swedish suffixes",
        "Swedish terms suffixed with -er",
        "Swedish terms suffixed with -na"
      ],
      "glosses": [
        "Suffix for definite plural for nouns of the third declension (common and neuter gender) which in indefinite form have the suffix -er"
      ],
      "links": [
        [
          "-er",
          "-er"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-erna"
}