posterboard means cardboard material suitable for making posters. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
Etymology
From poster + board.
noun
- 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.”
- A flyer printed on stiff cardboard, approximately 8.5 by 11 inches, mailed flat.“They sent me a nice posterboard on the new product.”