/ Dictionary / Index P plasterboard: Meaning and Definition of Find definitions for: plas•ter•board Pronunciation: (plas'tur-bôrd", -bōrd", plä'stur-), [key] — n. a material used for insulating or covering walls, or as a lath, consisting of paper-covered sheets of gypsum and felt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasterboard (Thesaurus) plaster plaster cast Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language