undatedKK [ˏʌnˋdetɪd] /ˌʌnˈdeɪtɪd/發音形容詞1未標日期的、未註明日期的The letter was undated, so we could not tell when it was written.這封信沒有標上日期,所以我們無法判斷是何時寫的。2日期未定的、未定日期的They signed an undated agreement to sell the land later.他們簽了一份日期未定的協議,日後再出售那塊土地。