[ U ] the number of letters received at one time or on one subject一次發送(或收進)的信件;(有關同一主題的)一批信件
It was clear from our postbag that viewers were unhappy about the programme.從我們收到的來信可以清楚看出,觀衆們對這個節目不滿意。
[ C ] a large strong bag used by the Post Office for transporting and carrying letters and parcels郵袋