posterboard

noun3

1. •
   Cardboard material suitable for making posters.

   • I used a piece of posterboard for my project.
2. •
   A piece of such material.

   • I used the posterboard for my project.
3. •
   A flyer printed on stiff cardboard, approximately 8.5 by 11 inches, mailed flat.

   • They sent me a nice posterboard on the new product.