"łastojčka" meaning in Upper Sorbian

{
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "łastojčka f",
      "name": "hsb-noun"
    }
  ],
  "lang": "Upper Sorbian",
  "lang_code": "hsb",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Upper Sorbian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Upper Sorbian entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Upper Sorbian terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "hsb",
          "name": "Perching birds",
          "orig": "hsb:Perching birds",
          "parents": [
            "Birds",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "swallow (bird)"
      ],
      "id": "en-łastojčka-hsb-noun-y6OgcM2j",
      "links": [
        [
          "swallow",
          "swallow"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "łastojčka"
}

{
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "łastojčka f",
      "name": "hsb-noun"
    }
  ],
  "lang": "Upper Sorbian",
  "lang_code": "hsb",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Upper Sorbian entries with incorrect language header",
        "Upper Sorbian entries with topic categories using raw markup",
        "Upper Sorbian feminine nouns",
        "Upper Sorbian lemmas",
        "Upper Sorbian nouns",
        "Upper Sorbian terms with non-redundant non-automated sortkeys",
        "hsb:Perching birds"
      ],
      "glosses": [
        "swallow (bird)"
      ],
      "links": [
        [
          "swallow",
          "swallow"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "łastojčka"
}