wallboard: Meaning and Definition of

wall•board

Pronunciation: (wôl'bôrd", -bōrd"), [key]
— n.
  1. material manufactured in large sheets for use in making or covering walls, ceilings, etc., as a substitute for wooden boards or plaster.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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