/ Dictionary / Index B boring bar: Meaning and Definition of Find definitions for: bor'ing bar" Pronunciation: [key] a bar holding a tool for boring a cylinder or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. boring boring machine Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language