n.

1. 招贴，海报，广告（画）；布告[C]
   They put up posters all round the town advertising the circus.

   他们在镇上四处张贴海报为马戏团作宣传。

n.[C]

1. 驿马
2. 【古】（骑驿马）赶路的旅客

n.

1. a large printed picture or notice used for decoration or advertisement.
2. Computing  a person who sends a message to a newsgroup.