poster

英 [ˈpəʊstə(r)]

美 [ˈpoʊstər]

n. 招贴画; 海报; 巨幅装饰画; (在网络留言板上)发布消息的人，张贴信息的人

复数：posters　

Collins.2 / BNC.3930 / COCA.3834

牛津词典

noun

招贴画；海报
a large notice, often with a picture on it, that is put in a public place to advertise sth
1. election posters
  选举海报
2. a poster campaign (= an attempt to educate people about sth by using posters )
  招贴宣传运动
巨幅装饰画
a large picture that is printed on paper and put on a wall as decoration
1. posters of her favourite pop stars
  她所喜爱的流行音乐歌星的大幅画片
（在网络留言板上）发布消息的人，张贴信息的人
a person who posts a message on a message board (= a place on a website where people can read or write messages)

大幅广告；海报；招贴画
Aposteris a large notice or picture that you stick on a wall or board, often in order to advertise something.

noun

a horse kept at an inn or post house for use by mail carriers or for rent to travelers
Synonym:post horsepost-horse
a sign posted in a public place as an advertisement
1. a poster advertised the coming attractions
Synonym:postingplacardnoticebillcard
someone who pastes up bills or placards on walls or billboards
Synonym:bill posterbill sticker

Also to the question poster, this is not a real question.
还问到海报，这不是一个现实问题。
She went out with a Calvin Klein poster boy
她和卡尔文·克莱恩品牌的一个广告代言人谈过恋爱。
The poster showed a caricature of Hitler with a devil's horns and tail
海报漫画中的希特勒长着魔鬼的犄角和尾巴。
I have your poster on my wall.
我的墙上都贴着你的海报呢。
The current national poster child is a tiny, freckle-faced redhead.
现在的那个全国广告代言人个头不高，红头发，脸上有雀斑。
I have an idea for our poster.
我有个关于海报的想法。
My little bro made this poster when I flew home.
当我飞回美国时我的弟弟为我做了这张海报。
Researchers can present their work in oral and poster sessions.
研究者可以在口头和海报论文中介绍他们的工作。
In the underground we see poster advertising holidays on spain.
在地铁站里，我们看到了为去西班牙度假作广告的海报。
I would like to make a poster about smoking.
我想做一个关于吸烟的海报。