/ Dictionary / Index P petty sessions: Meaning and Definition of Find definitions for: pet'ty ses"sions Pronunciation: [key] — Eng. Law. Eng. Law. a court of summary jurisdiction for minor offenses that is held without a jury. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petty officer petty treason Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language