/ Dictionary / Index B bosun bird: Meaning and Definition of Find definitions for: bo'sun bird" Pronunciation: [key] tropicbird. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bosun Boswash Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language