1. a lightweight building material consisting of a gypsum core sandwiched between layers of paper, used for interior walls and ceilings
Usage: also called drywall, wallboard, or plasterboard in different regions

Examples

• The contractor installed gypsumboard on all the interior walls of the new house.
• Gypsumboard is a cost-effective alternative to traditional plaster for finishing walls.
• We need to tape and mud the seams in the gypsumboard before painting.
• The fire-resistant gypsumboard helped slow the spread of flames in the building.
• Cutting gypsumboard requires a utility knife and a straightedge.
• The drywall crew finished hanging gypsumboard throughout the office in just two days.