Definition of Co-sign:

  1. Sign (document) with others or others.

  2. Sign and agree together. The person who signs the joint loan is responsible for repaying the loan when the other person does not lend it. Steve signed a joint loan so that Amy could get a car loan despite her bad reputation.

  3. Sign with others (loan or lease) to secure payment.

How to use Co-sign in a sentence?

  1. If you do not have a credit history, you will need someone to sign your loan.

Meaning of Co-sign & Co-sign Definition