/ Dictionary / Index C cost-justify: Meaning and Definition of Find definitions for: cost-jus•ti•fy Pronunciation: (kôst'jus"tu-fī", kost'-), [key] — -fied, -fy•ing. to justify the allotment or spending of a specific sum of money for (an investment, procurement, etc.). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. costive cost keeper Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language