1. to insure jointly with one or more other insurers; to share insurance coverage or risk with another insurer
Usage: third person singular present tense of coinsure; used in insurance and finance contexts

Examples

• The primary insurer coinsures the large commercial property with two other carriers.
• When the risk is too large for one company, multiple insurers coinsure the policy.
• The underwriter coinsures high-value claims to distribute risk across the market.
• Several Lloyd's syndicates coinsure major maritime ventures.
• The insurance company coinsures catastrophic coverage with its reinsurance partners.