/ Dictionary / Index C commercial code: Meaning and Definition of Find definitions for: commer'cial code" Pronunciation: [key] a telegraphic code designed to convey a message with a minimum number of words and thereby reduce toll costs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commercial break commercial college Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language