/ Dictionary / Index P pro-busing: Meaning and Definition of Find definitions for: pro-bus•ing Pronunciation: (prō-bus'ing), [key] — adj. favoring or advocating legislation that requires the busing of students from one school district to another to achieve racial balance in public schools. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proboscis monkey proc. Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language