"u" meaning in Lower Sorbian

{
  "forms": [
    {
      "form": "U",
      "tags": [
        "uppercase"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "dsb",
        "10": "",
        "2": "letter",
        "3": "",
        "4": "",
        "5": "upper case",
        "6": "U",
        "7": "",
        "8": "",
        "9": "",
        "sc": ""
      },
      "expansion": "u (upper case U)",
      "name": "head"
    },
    {
      "args": {
        "upper": "U"
      },
      "expansion": "u (upper case U)",
      "name": "dsb-letter"
    }
  ],
  "lang": "Lower Sorbian",
  "lang_code": "dsb",
  "pos": "character",
  "related": [
    {
      "_dis1": "0 0",
      "word": "Template:list:Latin script letters"
    },
    {
      "_dis1": "0 0",
      "word": "dsb."
    },
    {
      "_dis1": "0 0",
      "word": "Template:list:Latin script letter names"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "0 0 0 1 0 1 0 0 2 1 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 1 0 2 1 1 1 0 1 1 0 0 2 0 0 1 1 1 3 0 1 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 1 1 1 1 1 1 1 1 2 1 1 1 1 3 1 2 1 1 1 1 1 1 1 1 1 1 0 2 2 1 0 0 0 1 1 0 0 0 1 1 1 0 0 1 0 0 1 1 1 0 0 1 2 2 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 2 0 1 0 1 1",
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Lower Sorbian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The twenty-ninth letter of the Lower Sorbian alphabet, called u and written in the Latin script."
      ],
      "id": "en-u-dsb-character-nq-NTsa1",
      "links": [
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ],
        [
          "u",
          "u#Lower Sorbian"
        ]
      ],
      "tags": [
        "letter"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "dsb",
          "name": "Latin letter names",
          "orig": "dsb:Latin letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The name of the Latin-script letter u."
      ],
      "id": "en-u-dsb-character-YsAipQR9",
      "links": [
        [
          "u",
          "u#Lower Sorbian"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/u/"
    }
  ],
  "word": "u"
}

{
  "categories": [
    "Lower Sorbian entries with incorrect language header",
    "Lower Sorbian lemmas",
    "Lower Sorbian letters",
    "Lower Sorbian terms with IPA pronunciation",
    "Pages with raw sortkeys"
  ],
  "forms": [
    {
      "form": "U",
      "tags": [
        "uppercase"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "dsb",
        "10": "",
        "2": "letter",
        "3": "",
        "4": "",
        "5": "upper case",
        "6": "U",
        "7": "",
        "8": "",
        "9": "",
        "sc": ""
      },
      "expansion": "u (upper case U)",
      "name": "head"
    },
    {
      "args": {
        "upper": "U"
      },
      "expansion": "u (upper case U)",
      "name": "dsb-letter"
    }
  ],
  "lang": "Lower Sorbian",
  "lang_code": "dsb",
  "pos": "character",
  "related": [
    {
      "word": "Template:list:Latin script letters"
    },
    {
      "word": "dsb."
    },
    {
      "word": "Template:list:Latin script letter names"
    }
  ],
  "senses": [
    {
      "glosses": [
        "The twenty-ninth letter of the Lower Sorbian alphabet, called u and written in the Latin script."
      ],
      "links": [
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ],
        [
          "u",
          "u#Lower Sorbian"
        ]
      ],
      "tags": [
        "letter"
      ]
    },
    {
      "categories": [
        "dsb:Latin letter names"
      ],
      "glosses": [
        "The name of the Latin-script letter u."
      ],
      "links": [
        [
          "u",
          "u#Lower Sorbian"
        ]
      ],
      "tags": [
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/u/"
    }
  ],
  "word": "u"
}