A2
a large, printed picture or notice that you put on a wall, in order to decorate a place or to advertise something
Dictionary examples:
The poster of a bed made me sleepy at work. (0.0)
I used posters to cover the hole in my wall. (0.0)
I put up posters of vegetables to make me eat healthier. (0.0)
The children put up posters on the classroom walls. (14.5)
We noticed a poster advertising a circus. (24.4)