coinsurerglossary / COINSURER coinsurer. An insurer who shares losses sustained under an insurance policy. See coinsurance under INSURANCE. [Cases: Insurance 2285. C.J.S. Insurance §§ 1137–1143.] 词条贡献者 译员William,毕业于欧洲顶尖的高级翻译学院,专注翻译各种与区块链技术与数字货币有关的法律文件。