"sia" meaning in Norwegian Bokmål

{
  "etymology_templates": [
    {
      "args": {
        "1": "nb",
        "2": "no",
        "3": "-"
      },
      "expansion": "Norwegian",
      "name": "bor"
    },
    {
      "args": {
        "1": "nb",
        "2": "non",
        "3": "síðan"
      },
      "expansion": "Old Norse síðan",
      "name": "der"
    },
    {
      "args": {
        "1": "nn",
        "2": "sidan"
      },
      "expansion": "Norwegian Nynorsk sidan",
      "name": "cog"
    }
  ],
  "etymology_text": "From Norwegian dialectal sia, from Old Norse síðan. Compare Norwegian Nynorsk sidan.",
  "head_templates": [
    {
      "args": {
        "1": "nb",
        "2": "adverb"
      },
      "expansion": "sia",
      "name": "head"
    }
  ],
  "lang": "Norwegian Bokmål",
  "lang_code": "nb",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "siden"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Norwegian Bokmål entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of siden"
      ],
      "id": "en-sia-nb-adv-ayLMcdB5",
      "links": [
        [
          "siden",
          "siden#Norwegian Bokmål"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "sia"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "nb",
        "2": "no",
        "3": "-"
      },
      "expansion": "Norwegian",
      "name": "bor"
    },
    {
      "args": {
        "1": "nb",
        "2": "non",
        "3": "síðan"
      },
      "expansion": "Old Norse síðan",
      "name": "der"
    },
    {
      "args": {
        "1": "nn",
        "2": "sidan"
      },
      "expansion": "Norwegian Nynorsk sidan",
      "name": "cog"
    }
  ],
  "etymology_text": "From Norwegian dialectal sia, from Old Norse síðan. Compare Norwegian Nynorsk sidan.",
  "head_templates": [
    {
      "args": {
        "1": "nb",
        "2": "adverb"
      },
      "expansion": "sia",
      "name": "head"
    }
  ],
  "lang": "Norwegian Bokmål",
  "lang_code": "nb",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "siden"
        }
      ],
      "categories": [
        "Norwegian Bokmål adverbs",
        "Norwegian Bokmål entries with incorrect language header",
        "Norwegian Bokmål lemmas",
        "Norwegian Bokmål terms borrowed from Norwegian",
        "Norwegian Bokmål terms derived from Norwegian",
        "Norwegian Bokmål terms derived from Old Norse"
      ],
      "glosses": [
        "Alternative form of siden"
      ],
      "links": [
        [
          "siden",
          "siden#Norwegian Bokmål"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "sia"
}