- a form of property insurance in which the insured shares in losses proportionately to the extent that the amount of insurance falls short of a specified percentage of the value of the insured property
- joint insurance by two or more insurers
- Insurance held jointly by two or more insurers.
- A form of insurance in which a person insures property for less than its full value and agrees to be responsible for the difference.
- A sum of money paid by a patient to a health care provider after a health insurance company has paid a contractual amount for a covered service, usually a fixed percentage of costs. Coinsurance usually applies after an annual deductible has been paid.
(countable and uncountable, plural coinsurances)
co- + insurance