/ Dictionary / Index B boatswain's pipe: Meaning and Definition of Find definitions for: boat'swain's pipe" Pronunciation: [key] a high-pitched whistle used by a boatswain for giving signals. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. boatswain's chair boat tail Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language