Breadcrumb Home > Dictionary > Index P probation officer: Meaning and Definition of Find definitions for: proba'tion of"ficer Pronunciation: [key] an officer who investigates and reports on the conduct of offenders who are free on probation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. probationer probative ✖ Related Content Daily Word Quiz: quadrumanous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language