Dictionary

wallboard

noun wall·board \ˈwl-ˌbrd\

: building material that is used for making walls and ceilings and that is made of large sheets of plaster covered with thick paper

Full Definition of WALLBOARD

:  a structural boarding of any of various materials (as wood pulp, gypsum, or plastic) made in large rigid sheets and used especially for sheathing interior walls and ceilings

First Known Use of WALLBOARD

1906

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