/ Dictionary / Index P pro bono: Meaning and Definition of Find definitions for: pro bo•no Pronunciation: (prō" bō'nō), [key] done or donated without charge; free: pro bono legal services. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. problematics pro bono publico* Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language