/ Dictionary / Index C common pleas: Meaning and Definition of Find definitions for: com'mon pleas' Pronunciation: [key] — Law. Law. civil actions or proceedings between private citizens. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commonplace book common prayer Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language