/ Dictionary / Index P private investigator: Meaning and Definition of Find definitions for: pri'vate inves'tigator. Pronunciation: [key] SeeAbbr.: p.i., P.I. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. private international law private judgment Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language