"fössta" meaning in Swedish

{
  "forms": [
    {
      "form": "fösste",
      "tags": [
        "masculine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "numeral",
        "3": "masculine",
        "4": "fösste"
      },
      "expansion": "fössta (masculine fösste)",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "num",
  "senses": [
    {
      "alt_of": [
        {
          "word": "första"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish pronunciation spellings",
          "parents": [
            "Pronunciation spellings",
            "Terms by orthographic property",
            "Terms by lexical property"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Fössta tossdan i mass.\nFi'st Thu'sday in Ma'ch.",
          "type": "example"
        }
      ],
      "glosses": [
        "Pronunciation spelling of första."
      ],
      "id": "en-fössta-sv-num-gJzYXQHz",
      "links": [
        [
          "Pronunciation spelling",
          "pronunciation spelling"
        ],
        [
          "första",
          "första#Swedish"
        ]
      ],
      "raw_glosses": [
        "(Småland dialect) Pronunciation spelling of första."
      ],
      "tags": [
        "alt-of",
        "pronunciation-spelling"
      ]
    }
  ],
  "word": "fössta"
}

{
  "forms": [
    {
      "form": "fösste",
      "tags": [
        "masculine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "numeral",
        "3": "masculine",
        "4": "fösste"
      },
      "expansion": "fössta (masculine fösste)",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "num",
  "senses": [
    {
      "alt_of": [
        {
          "word": "första"
        }
      ],
      "categories": [
        "Swedish dialectal terms",
        "Swedish entries with incorrect language header",
        "Swedish lemmas",
        "Swedish numerals",
        "Swedish pronunciation spellings",
        "Swedish terms with usage examples"
      ],
      "examples": [
        {
          "text": "Fössta tossdan i mass.\nFi'st Thu'sday in Ma'ch.",
          "type": "example"
        }
      ],
      "glosses": [
        "Pronunciation spelling of första."
      ],
      "links": [
        [
          "Pronunciation spelling",
          "pronunciation spelling"
        ],
        [
          "första",
          "första#Swedish"
        ]
      ],
      "raw_glosses": [
        "(Småland dialect) Pronunciation spelling of första."
      ],
      "tags": [
        "alt-of",
        "pronunciation-spelling"
      ]
    }
  ],
  "word": "fössta"
}