/ Dictionary / Index C coinsurer: Meaning and Definition of Find definitions for: co•in•sur•er Pronunciation: (kō"in-shoor'ur, -shûr'-), [key] — n. a person or firm that contracts as an insurer jointly with another or others. an insured who is liable to bear part of the loss under a coinsurance provision. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coinsure Cointreau Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language