Definition from Wiktionary, the free dictionary
- (uncountable) Cardboard material suitable for making posters.
- I used a piece of posterboard for my project.
- A piece of such material.
- I used the posterboard for my project.
- (direct marketing) A flyer printed on stiff cardboard, approximately 8.5 by 11 inches, mailed flat.
- They sent me a nice posterboard on the new product.