cosign

/ˈkoʊsaɪn/
verb
  1. To sign a document (such as a loan or lease) along with another person, agreeing to be responsible if the other person fails to pay or perform.
    • She cosigned the apartment lease for her son while he was still in college.
    • My father agreed to cosign my first car loan because I had no credit history.
    • The bank requires a parent to cosign the loan for students under 21.
  2. To endorse or support an idea, plan, or action jointly with others.
    • We all cosigned the petition to save the local park.
    • The committee members cosigned the proposal for a new community center.
    • Several senators cosigned the bill to improve public school funding.
noun
  1. A person who signs a document jointly with another, especially to guarantee a loan.
    • As a cosign on the lease, you are legally responsible for the rent.
    • The bank asked for a cosign with a steady income before approving the mortgage.
    • He acted as a cosign for his friend's business loan.
What does "cosign" mean? | whatsthatwordmean | whatsthatwordmean