what is a wallboard
Noun. 1. wallboard-a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses. dry wall, drywall. beaver board-a light wallboard made of compressed wood pulp.allboard. n. 1. (Building) a thin board made of materials, such as compressed wood fibres or gypsum plaster, between stiff paper, and used to cover walls, partitions, etc. (ËwÉlËbÉrd, -ËboÊrd).