/ Dictionary / Index B board side: Meaning and Definition of Find definitions for: board' side" Pronunciation: [key] the broad side of a piece of lumber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. boardsailing boardwalk Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language