[plas-ter-bawrd, -bohrd, plah-ster-]
a material used for insulating or covering walls, or as a lath, consisting of paper-covered sheets of gypsum and felt.
Origin of plasterboard
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a thin rigid board, in the form of a layer of plaster compressed between two layers of fibreboard, used to form or cover walls
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012