There are multiple definitions - click on the translation that matches your context.

Gesellschaft auf Gegenseitigkeit

Substantiv

partial

mutual insurance

noun

Comparative law notes

Close match when the German context is insurance.

Definitions of mutual insurance

a mutual insurance company is one whose sole purpose is to provide insurance coverage for its members and policyholders and is owned by its policyholders

A California court decided Friday that Lawyers Mutual Insurance Co. could collect the arbitration award related to coverage for legal malpractice claims.