/ Dictionary / Index C commercial law: Meaning and Definition of Find definitions for: commer'cial law' Pronunciation: [key] the legal regulations governing transactions and related matters in business and trade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commercialize commercial paper Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language