/ Dictionary / Index C cost-effective: Meaning and Definition of Find definitions for: cost-ef•fec•tive Pronunciation: (kôst'i-fek'tiv, kost'-), [key] — adj. producing optimum results for the expenditure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cost-effective (Thesaurus) costectomy cost-efficient Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language