1. past tense of cosign; signed a document jointly with another person, especially to guarantee a loan or debt
Usage: financial/legal context

Examples

• My parents cosigned the loan for my first car.
• She cosigned her daughter’s student loan application.
• He regretted having cosigned his friend’s mortgage.
• The bank required that someone cosigned the lease agreement.
• They cosigned the business loan together.
• After he cosigned the credit card, he became responsible for the debt.