"bü" meaning in Volapük

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "büä"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vo",
        "2": "preposition"
      },
      "expansion": "bü",
      "name": "head"
    }
  ],
  "lang": "Volapük",
  "lang_code": "vo",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "_dis": "74 26",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "91 9",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "93 7",
          "kind": "other",
          "name": "Volapük entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "63 37",
          "kind": "other",
          "name": "Volapük prepositions",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "before, ago (bü yels tel = two years ago)"
      ],
      "id": "en-bü-vo-prep-OgV-AoXA",
      "links": [
        [
          "before",
          "before"
        ],
        [
          "ago",
          "ago"
        ]
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "english": "It is a quarter to three.",
          "text": "Binos foldil bü düp kilid",
          "type": "example"
        },
        {
          "english": "I wish to be at the station a quarter of an hour before the departure of the train.",
          "ref": "1931, Arie de Jong, Gramat Volapüka, § 256:",
          "text": "Vipob binön tö stajon tü foldil düpa bü deveg trena.",
          "type": "quote"
        }
      ],
      "glosses": [
        "to, before (when telling time)"
      ],
      "id": "en-bü-vo-prep-kWLLozZ4",
      "links": [
        [
          "to",
          "to"
        ],
        [
          "before",
          "before"
        ]
      ]
    }
  ],
  "word": "bü"
}

{
  "categories": [
    "Pages with 1 entry",
    "Pages with entries",
    "Volapük entries with incorrect language header",
    "Volapük lemmas",
    "Volapük prepositions"
  ],
  "derived": [
    {
      "word": "büä"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vo",
        "2": "preposition"
      },
      "expansion": "bü",
      "name": "head"
    }
  ],
  "lang": "Volapük",
  "lang_code": "vo",
  "pos": "prep",
  "senses": [
    {
      "glosses": [
        "before, ago (bü yels tel = two years ago)"
      ],
      "links": [
        [
          "before",
          "before"
        ],
        [
          "ago",
          "ago"
        ]
      ]
    },
    {
      "categories": [
        "Volapük terms with quotations",
        "Volapük terms with usage examples"
      ],
      "examples": [
        {
          "english": "It is a quarter to three.",
          "text": "Binos foldil bü düp kilid",
          "type": "example"
        },
        {
          "english": "I wish to be at the station a quarter of an hour before the departure of the train.",
          "ref": "1931, Arie de Jong, Gramat Volapüka, § 256:",
          "text": "Vipob binön tö stajon tü foldil düpa bü deveg trena.",
          "type": "quote"
        }
      ],
      "glosses": [
        "to, before (when telling time)"
      ],
      "links": [
        [
          "to",
          "to"
        ],
        [
          "before",
          "before"
        ]
      ]
    }
  ],
  "word": "bü"
}