guaranty

(gărˈən-tē)

1. An agreement by which one person assumes the responsibility of assuring payment or fulfillment of another's debts or obligations.
2. a. Something given as security for the execution, completion, or existence of something else.
   b. The act of providing such security.
3. a. A guarantee, as for a product or service: a new refrigerator still under guaranty.
   b. A guarantee to perform something in a specified way.
4. A guarantee serving to assure a particular outcome or condition.
5. A guarantor.