1 a large notice, often with a picture on it, that is put in a public place to advertise sth:
election posters * a poster campaign (= an attempt to educate people about sth by using posters) * a wanted poster (= with a picture of a person that the police are looking for) * They put up a poster advertising the concert.
2 a large picture that is printed on paper and put on a wall as decoration:
posters of her favourite pop stars
