/ Dictionary / Index C common cost: Meaning and Definition of Find definitions for: com'mon cost' Pronunciation: [key] — Accounting. Accounting. costs assignable to two or more products, operations, departments, etc., of a company. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. common cold common council Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language