/ Dictionary / Index C commercial paper: Meaning and Definition of Find definitions for: commer'cial pa"per Pronunciation: [key] negotiable paper, as drafts, bills of exchange, etc., given in the course of business. corporate promissory notes, usually short-term and unsecured, sold in the open market. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commercial law commercial pilot 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