/ Dictionary / Index B board of commissioners: Meaning and Definition of Find definitions for: board' of commis'sioners Pronunciation: [key] the administrative body of a county in many U.S. states, esp. in the South and the West, having from two to seven elected members. Cf. board of supervisors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. board measure board of education Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language