/ Dictionary / Index P paperboard: Meaning and Definition of Find definitions for: pa•per•board Pronunciation: (pā'pur-bôrd", -bōrd"), [key] — n. a thick, stiff cardboard composed of layers of paper or paper pulp compressed together; pasteboard. —adj. of, pertaining to, or made of paperboard. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: paperboard (Thesaurus) paper birch paperboy Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language