至於妳的補充，回答如下：先來看下牛津高階詞典中對Delay的釋義：
delay
v
[I, In/pr, Tn] (cause sb to) be slow or late 使（某人）慢或遲到; 耽擱; 延誤: Don't delay! Book your holiday today! 別拖延! 今天就定下妳休假的日子! * She delayed (for) two hours and missed the train. 她耽擱兩個小時, 把火車誤了. * I was delayed by the traffic. 因交通阻塞, 我遲到了.
[Tn, Tg] put (sth) off until later; postpone 推遲（某事）; 延期: We must delay our journey until the weather improves. 我們必須把旅行推遲, 等天氣好轉再說. * Why have they delayed opening the school? 他們為什麼延期開學?
妳所提問的句子中delay是被動態，所以就是及物動詞，因此釋義可參照以上第二條。
再者，如果會議是壹直開到明早十點的話，那這個句子就不應該用delay，而是應該用last，表示持續動作：The meeting will be lasted till ten o'clock tomorrow morning。