/ Dictionary / Index B borescope: Meaning and Definition of Find definitions for: bore•scope Pronunciation: (bôr'skōp", bōr'-), [key] — n. Optics. an instrument using optical fibers for the visual inspection of narrow cavities, as the bore of a gun. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. borer boresight Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language