ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
1. : one that underwrites : guarantor , supporter
the citizen taxpayer has succeeded … as the principal underwriter of the costs of science — Scientific American Reader
2. : one that underwrites a policy of insurance : an individual or company that insures : insurer
3. : one that underwrites or shares in underwriting a security issue
4. : one who selects risks to be solicited
life underwriter
or classifies and rates the acceptability of risks solicited
fire underwriter
home-office underwriter