- insurance underwritten jointly with another or others.
- a form of property insurance in which an insurer assumes liability only for that proportion of a loss which the amount of insurance bears to a specified percentage of the value of the property.
- a form of health insurance in which the insured party contributes a specified percentage of the total cost of medical expenses after a deductible has been reached.
- the percentage contributed by the insured party: My coinsurance is 20%.
- a method of insurance by which property is insured for a certain percentage of its value by a commercial insurance policy while the owner assumes liability for the remainder
- joint insurance held by two or more persons
