/ Dictionary / Index C coessential: Meaning and Definition of Find definitions for: co•es•sen•tial Pronunciation: (kō"i-sen'shul), [key] — adj. united in essence; having the same essence or nature. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coesite coetaneous Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language