"baltsa" meaning in Basque

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en basque",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Basque",
      "orig": "basque",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "batza"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Basque du Pays basque français",
          "orig": "basque du Pays basque français",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "ez dut zuen baltsan sartu nahi, je ne veux pas rejoindre votre groupe."
        }
      ],
      "glosses": [
        "Variante de batza."
      ],
      "id": "fr-baltsa-eu-noun-5ViWjon2",
      "raw_tags": [
        "Pays basque français"
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "baltsa"
}

{
  "categories": [
    "Noms communs en basque",
    "basque"
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "batza"
        }
      ],
      "categories": [
        "basque du Pays basque français"
      ],
      "examples": [
        {
          "text": "ez dut zuen baltsan sartu nahi, je ne veux pas rejoindre votre groupe."
        }
      ],
      "glosses": [
        "Variante de batza."
      ],
      "raw_tags": [
        "Pays basque français"
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "baltsa"
}