/ Dictionary / Index B best man: Meaning and Definition of Find definitions for: best' man' Pronunciation: [key] the chief attendant of the bridegroom at a wedding. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bestir bestow Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language