/ Dictionary / Index C conc.: Meaning and Definition of Find definitions for: conc. Pronunciation: [key] concentrate. concentrated. concentration. concerning. concrete. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. con brio concatenate Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language